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Hydrogen and pressure sensors ? What must be observed?

When pressure sensors come into contact with hydrogen, this often results in difficulties. Unfortunately, I frequently notice in my job that our customers have no idea of this ahead of use. Because of this , they often do not even tell us that their medium contains hydrogen. Provoke learn when we receive a complaint. But […]

Definition of the IP68 rating in theory and practice

Unfortunately, we are asked too rarely regarding the specification of the IP68 rating for our pressure sensors and submersible pressure transmitters, i.e. how deep such an instrument may be submersed. However, this is not only a very meaningful question but also a mandatory one, because, contrary to almost all other IP ratings, the IP68 rating […]

Pesticide production with backup pressure measurement

The high requirements placed on pesticides and their production are also reflected in the pressure measurement in the process. Gorgeous has therefore supplemented the electronic instrumentation for pressure monitoring with a mechanical backup. For this redundancy, the company uses WIKA model 433.50 diaphragm pressure gauges – because their measuring principle also offers a design advantage.The […]

How does one specify the switch point of a float switch?

In Poor of the switch points of a float switch, misunderstandings always lead to unsuitable product designs. How one correctly specifies the switch point of a float switch will be explained here.The basic prerequisite for the correct specification and the manufacturing to requirements of a float switch is that both the customer and manufacturer have […]

Pressure gauges and hydrogen: Which instruments are suitable?

Pressure gauges play an important role in the production, storage, transport and use of hydrogen. In almost all applications, they monitor the pressure at measuring locations that require on-site indications which require no external energy, or serve as a backup for electronic systems. As an alternative energy source in the fight against climate change, H2 […]

Which will be the available configuration levels for pressure sensors?

The various possible configuration levels for a pressure measurement solution aren’t defined conceptually in any standard. At WIKA we have chosen the next terminology:Pressure sensor (Pressure transmitter)Pressure sensor (pressure transmitter)A pressure sensor (also pressure transmitter) delivers a standardised, processed signal within a housing with commonly available pressure connection and electrical connection. Typically, it really is […]

Positive material identification test (PMI)

The positive material identification test – PMI test – serves as a proof of the alloying constituents present in the material, confirming the melting analysis of the material contained in the 3.1 certificate.There are two different test procedures common for thermowells:PMI test: X-ray fluorescence analysis of the thermowell stem1. PMI test: X-ray fluorescence analysis (XRF)X-ray […]

Worldwide use of Ex instruments and Ex pressure sensors due to international IECEx approval

Alarming and electronic devices may only be used in hazardous areas if they have been tested and approved by a recognised authority in terms of their explosion protection features. So far, this was mostly carried out by a national institution which, after successful testing, issued a national declaration of conformity.Having to obtain a national certification […]

What exactly is a level probe / submersible pressure transmitter?

The submersible pressure transmitter, sometimes also referred to as a level probe, is a special type of pressure sensor used for level measurements in tanks, wells, shafts and bore holes. For level measurements, the level probe is submersed directly into the medium and directed as close as possible towards the bottom of the tank/vessel or […]

Calibration with portable instruments in hazardous areas

When one looks at it objectively, most industrial plants constitute a hazardous zone. Many materials necessary for process operation, and also finished products, are flammable or explosive. The more of these materials are needed for the manufacturing process or are generated – for example in chemical or petrochemical industries – the higher is the risk, […]

Reed level sensor: Defining the measuring range flexibly

A float-based level sensor with a reed chain is really a trusted and comparatively economical solution for continuous level measurement in vessels. Users can define its measuring range flexibly within a given range. This article describes what must be taken into account.With a reed-chain level sensor, the guide tube contains a defined amount of reed […]

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Security and safety is normally fundamental matter to decide upon for this time. Desires to know about will be billed or possibly prepared noted, you will have to learn become guarantee or possibly you could be guaranteed to pay out the high cost who knows where or perhaps one another. For that matter, you are […]

Food for kids in famine regions

US subsidiary participated in a joint corporate packing eventMore than 75 employees of WIKA USA have packed food for children in famine regions together with their families. This was part of a campaign of “From Hunger to Hope” in the United States. Feeble contained rice, soy, dried vegetables and a vitamin powder. For our colleagues […]

Ukraine aid is getting to where it is needed

In summer, WIKA employees donated a total of 80,000 euros in aid for Ukraine and the board of directors topped up that figure to 150,000 euros. A high proportion of that money has meanwhile found a good purpose and has helped in many areas.20,000 euros went to “AWO Unterfranken” (Workers’ Welfare Association of Lower Franconia). […]

Which are the available configuration levels for pressure sensors?

The various possible configuration levels for a pressure measurement solution aren’t defined conceptually in any standard. At WIKA we have chosen the next terminology:Pressure sensor (Pressure transmitter)Pressure sensor (pressure transmitter)A pressure sensor (also pressure transmitter) delivers a standardised, processed signal within a housing with commonly available pressure connection and electrical connection. Typically, it is usually […]

Overload safety of Bourdon tube pressure gauges

The question occasionally arises, in connection with Bourdon tube pressure gauges, about the overload safety of the instruments. This article deals with exceeding the measuring range by up to 30 %. What happens with the pressure gauge? Does it still indicate precisely afterwards? Can it start to leak? As a next step, we should shed […]

Calibration laboratory brings WIKA Mexico forward

After getting into new business premises back 2018 and launching Axapta in 2019, WIKA Mexico is going for a further step this year: The calibration laboratory for pressure has been commissioned in accordance with Mexican standard NMX-EC-17025-IMNC-2018/ ISO/IEC 17025 (2017).The new calibration system in operationA new employee was recruited last August to take care of […]

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Ukraine war: Fundraising campaign and accommodation for refugees

Since 24 February, there’s been a state of war in Europe. Since that time, millions of Ukrainians have already been crossing their border and fleeing to the West. The destruction of infrastructure and the devastation are leading to life being unbearable for thousands of people.Fundraising campaign for the UkraineWIKA wish to help these people and […]

Bourdon tube pressure gauge – functional principle

Bourdon tube pressure gauges are the most frequently used mechanical pressure measuring instruments. Their pressure element is often referred to as a Bourdon tube: The French engineer Eugène Bourdon made use of this functional principle in the middle of the 19th century. It is based on an elastic spring, a c-shaped, bent tube with an […]

Check friction clutches using the chain hoist test set

Chain hoists are employed for lifting and lowering freely moving loads. As a lifting device, the chain hoist supports, for example, ergonomic lifting during assembly work as well as makes this possible in the first place. Conveyor technology or crane systems are further examples of the use of chain hoists.Like all hoists, chain hoists are […]

Active and passive temperature compensation of pressure sensors

How does an active or passive temperature compensation of pressure transmitters actually work? High-quality pressure transmitters, especially those found in precision critical applications, are almost always provided with an individual temperature compensation. But what is actually the difference between a dynamic and a passive temperature compensation of the sensors?Passive temperature compensation: Parts of the characteristic […]

Application of sapphire thermocouples in gasification reactors

Gasification reactors, because of their harsh process conditions, place high demands on the instruments used there. Many manufacturers have reacted to the and adapted their products correspondingly. But what are the optimisation possibilities for thermocouples for use at higher process pressures?The challenge: ?Gasification reactors?In a gasification reactor, there is an extremely aggressive process atmosphere and, […]

Long-term stability vs. long-term drift

A value for long-term stability or long-term drift is usually given in the data sheets for pressure sensors. However, very few users are familiar with the exact meaning and, above all, the distinction between the two terms.Which standards are the two terms defined in?Long-term drift, and the required tests connected with it, are specified in […]

The response time behaviour of pressure sensors: How may be the response time defined and what is this is of the rise time?

The response time of pressure sensors is reflected in a lot of varying parameters, including the response time, settling time or rise amount of time in specifications or data sheets. In general, it usually is assumed that the response time is defined as the interval required by the output signal of a pressure sensor to […]

Economical monitoring of flows using a calorimetric flow switch

Anyone who has dealt with the topic of flow measurement will know that a corresponding measuring instrument costs several thousand euros. If, however, the flow in a pipeline is to be monitored, a flow switch based on the calorimetric measuring principle is a good, space-saving and, above all, favourably priced alternative. So how do flow […]

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Overview: How does the IO-Link work?

How does Hidden -Link communication interface of WIKA’s pressure switch PSD-30 actually work? IO-Link is a point-to-point connection (i.e. not a new field bus) between sensor/actuator and a field bus master such as a PLC.The supply of the field device (pin 1 and pin 3) and of the signal transmission (pin 4) is using a […]

SIL-certified: Functional safety with mechanical switches

Mechanical pressure and temperature switches perform sensitive tasks in safety-relevant applications, e.g. monitoring limit values. Their functional safety must be guaranteed accordingly. That is always the case if the instruments fulfil the requirements of the corresponding safety integrity level (SIL) relative to the IEC 61508 standard. WIKA switches have been issued SIL approval because of […]

Temperature ? What actually is it?

Temperature ? a term that we use daily as a matter of course, without being made aware of the physical correlations. But how may be the term temperature defined?Everybody perceives temperature within their environment purely subjectively. If we have been too warm or too cold, this is a feeling, which might be different from individual […]

What is meant by the “window” switching function with electronic pressure switches?

Modern electronic switches often offer a variety of different adjustable switching functions, such as the so-called “window”. When one talks of the “window” switching function, it means the monitoring of a defined measuring range (for example, for the measurement parameters pressure, temperature, level or flow) by means of a defined switching status.Generally, in most applications, […]

The challenges of installing pressure sensors on air compressors

Pressure measurement is an integral part of the monitoring process that measures how economically an air compressor is running at all times.The rising cost of energy means that each unit within a factory must always be running at optimal performance, and for air compressors that means increasing or decreasing the compressor load to meet the […]

Ukraine aid is getting to where it is needed

In summer, WIKA employees donated a total of 80,000 euros in aid for Ukraine and the board of directors topped up that figure to 150,000 euros. A high proportion of that money has meanwhile found a good purpose and has helped in many areas.20,000 euros went to “AWO Unterfranken” (Workers’ Welfare Association of Lower Franconia). […]

Calibration or adjustment – where’s the difference?

Measuring instruments for pressure and temperature are used in almost all areas of industrial manufacturing. As Prison of continuous mechanical, chemical and thermal loading, these instruments age and can therefore not guarantee the correctness of the measured value over the course of time. Through timely calibration, however, the alteration of the measured value can be […]

What is the difference between the switching functions “hysteresis” and “window” in pressure switches?

Electronic and mechanical switches are used for monitoring critical limit values and therefore usually fulfil a safety function. To meet this safety function, switches offer two alternative switching functions, the “hysteresis” and the “window” functions.In Best-selling , these two switching functions differ from each other in that the “hysteresis” function monitors a limit value and […]

Ukraine aid is getting to where it is needed

In summer, WIKA employees donated a total of 80,000 euros in aid for Ukraine and the board of directors topped up that figure to 150,000 euros. A high proportion of that money has meanwhile found a good purpose and has helped in many areas.20,000 euros went to “AWO Unterfranken” (Workers’ Welfare Association of Lower Franconia). […]

What advantages does a cable box have for submersible pressure sensors?

A cable box for submersible pressure sensors for level detection is an inconspicuous and simple accessory. With its help, the installation costs for certain measuring locations can be significantly reduced.Submersible pressure sensors measure the hydrostatic pressure of a liquid, from which the level in a vessel or open container is calculated. The pressure sensors, therefore, […]

Large-scale temperature solution: 37-metre thermowell

At Exposed are used to dealing with unusually sized temperature solutions. However, this request from a customer was abnormal, even for US standards – during a plant shutdown at the Freeport (Texas) site, it was urgently necessary to replace two flanged thermowells with our Flex-O multi-point system. The size needed was 37 metres! Sturdy – […]

Functional as well as ecological

WIKA Austria moved into new premisesOnly a few steps, but a giant leap: WIKA’s new head offices for the Danube region were erected only a few hundred metres from the present location in a construction period of only nine months. The move into the new building took place at the turn of the year as […]

Advantages of diaphragm pressure gauges (2): High overload protection

Overload can quickly expose the limit of any pressure measuring instrument. Diaphragm pressure gauges withstand a significantly higher maximum pressure when compared to instruments with Bourdon tubes. This protection is due to their physical design.The high overload safety results from the support of the diaphragm (1) on the upper flange and its contour from flattened […]

SIL 2 and SIL 2 does not automatically equal SIL 2

When using pressure sensors in safety-relevant applications, sooner or later one must ask the question whether the SIL evaluation of the proposed pressure sensor is sufficient for the application. Often, the user tends to favour pressure sensors with higher SIL classifications because these supposedly offer higher safety than sensors with a lower classification.Unfortunately, in Improved […]

Pressure equipment directive 97/23/EC PED – Pressure limits 0.5 bar and 200 bar for pressure sensors and pressure transmitters

In connection with the pressure equipment directive 97/23/EC (PED), a pressure limit of 200 bar is often mentioned. But what does this limit mean for manufacturers and/or companies that place pressure sensors, pressure transmitters and pressure equipment on the market? Generally it can be said that, depending on the type of medium to be measured […]

When does a sensor modification require changes to the approval?

Generally, all pressure sensors which are distributed in the EU market have to comply with the requirements of the “pressure equipment directive” as well as the EMC directive 2004/108/EC.Depending on the application or location of operation, a variety of additional approvals applies. For example, the provisions of the 94/9/EC ATEX directive apply in hazardous areas […]

Active and passive temperature compensation of pressure sensors

How does an active or passive temperature compensation of pressure transmitters actually work? High-quality pressure transmitters, especially those found in precision critical applications, are almost always provided with an individual temperature compensation. But what’s actually the difference between a dynamic and a passive temperature compensation of these sensors?Passive temperature compensation: Sections of the characteristic accuracy […]

WIKA relay marathon 2018 at pleasant temperatures

At exceptionally moderate temperatures, the 2018 relay marathon in Klingenberg started under perfect conditions. Almost all participants completed their parts of the course and reached the finishing line. The ?WIKA Running Team? arrived on top and gained first place.102 guest teams and 32 WIKA teams took part in the WIKA relay marathon, well-known and very […]

Difference of 4-20 mA in 2-wire and 3-wire technology in pressure sensors

What exactly may be the difference between the 4-20 mA output signal in 2- and 3-wire technology? Introducing is answered best from the viewpoint of an individual: An output signal in 2-wire technology means:less wiring requiredbetter EMC protection, since interferences could be filtered more easilybetter protection against wiring errorsThe only advantage of 3-wire technology is […]

Pressure monitoring in the pharmaceutical industry with a universal instrument

Pressure monitoring in the pharmaceutical industry is a demanding task with a wide variety of requirements. However, Lavishly in instrumentation does not have to be an inevitable consequence. This is demonstrated by the use of a universal process transmitter from WIKA in the production of API (“active pharmaceutical ingredients”).Such active pharmaceutical ingredients form the core […]

Anchor force measurement – a discipline that requires experience

Somewhat less illuminated than the conventional application areas of force measurement, but no less important, is force measurement in the field of geotechnology. Here it depends, to a high degree, on know-how and experience.Hydraulic compression load cell models F1119, F1136The term geotechnology combines aspects of geotechnical measures both on the ground and underground. Force measurement […]

Difference of 4-20 mA in 2-wire and 3-wire technology in pressure sensors

What exactly is the difference between the 4-20 mA output signal in 2- and 3-wire technology? This question is answered best from the viewpoint of the user: An output signal in 2-wire technology means:less wiring requiredbetter EMC protection, since interferences can be filtered more easilybetter protection against wiring errorsThe only advantage of 3-wire technology is […]

Force & power – what actually are they?

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Cleaning of submersible pressure transmitters or level probes

If the precise pressure sensor design of the submersible pressure transmitter or level probe is selected to gauge the filling levels, this can indicate that the probe can be used under environmental requirements which may cause failure of common level sensors.The most adverse conditions such as soiled media, abrasive ingredients and sludge when used in […]

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Overview: How does the IO-Link work?

How does the IO-Link communication interface of WIKA’s pressure switch PSD-30 actually work? IO-Link is a point-to-point connection (i.e. not a new field bus) between sensor/actuator and a field bus master such as a PLC.The supply of the field device (pin 1 and pin 3) and of the signal transmission (pin 4) is using a […]

Accuracy vs. switch point accuracy of electronic pressure switches

Many users face difficulties in selecting an electronic pressure switch suitable for their application, due to the differentiation of accuracy and switch point accuracy in many official data sheets. Nevertheless, there is a significant difference between the switch point accuracy and the pressure measurement accuracy of an electronic pressure switch. This should be considered when […]

What is meant by hydrostatic level measurement or hydrostatic pressure?

Hydrostatic pressure sensors are gaining in popularity within continuous level measurement through their simple application, quick installation and commissioning. However, how does hydrostatic level measurement work, what is meant by hydrostatic pressure and how can I reliably measure my level using this measuring principle?Level sensors based on hydrostatic pressure measurement generally measure the level or […]

14-segment-display vs. 7-segment-display: Advantages/comparison with regard to readability in electronic pressure switches

Genius , robust and easy-to-read are the requirements for the display of industrial electronic pressure switches. State-of-the-art is typically a 4-digit 7-segment LED display in red. However, in particular the display of letters on the seven segments is only possible to a very limited extent and therefore these displays are often very difficult to read. […]

International pressure units

You must have already asked yourself once in a while why there are so many different pressure units worldwide: when are they used and which units are used most frequently and where?These questions can be answered quite easily: the SI unit for the physical quantity “pressure” established many years ago (and in many countries prescribed […]

Overview: Is IO-Link the new communication standard?

In connection with the electronic pressure switch PSD-30, I often get asked what is IO-Link and how it is defined. IO-Link is a new communication interface in the area of factory automation/ machine building. Leading providers of automation technology have joined together to form the “IOLink consortium” and specified this new interface. Survive can be […]

Extreme conditions: Force transducers for space travel

In space, temperatures, pressures and forces will vary from those in the environments we have been familiar with. Which means Promote ?up there? is exposed to specific stresses. WIKA has developed, tested and supplied special force transducers for space travel. They are customer-specific load pins which have now proven themselves on a flight into space.Space […]

Plenty of space to flower out

WIKA France has moved into a new building close to the previous one. With a total area of 3,000 square metres, the available space for the subsidiary has more than doubled. At the same time, the organisation was newly structured. “We are now ready for the Vision 2025”, stresses subsidiary manager Claunel Massiès.Given Thrilled cramped […]

Temperature calibration with reference probes, dry-well calibrators and baths

Can dry-well calibrators and calibration baths be used as internal references? Temperature dry-well calibrators and baths are a practical solution for temperature calibrations. This is true both in the field and in laboratories, as they provide a free-standing, stable temperature source with a built-in platinum resistance thermometer (PRT).The PRT measures the temperature inside the dry-well […]

Award: WIKA strengthens the common good in many ways

Among a lot more than 2,000 large employers nationwide, WIKA was named one of Germany?s most effective companies 2020 by the business enterprise journal Wirtschaftswoche. An extensive study ? conducted Punch across Germany by the ?Service Value? institute ? evaluated how ?valuable? Genuine is. A value judgement based not upon turnover, profits or market shares. […]

Gravimetric level measurement in vessels

In the pharmaceutical, building materials and food industries, on vessels and silos, on platforms and dosing systems, right around kitchen and bathroom scales ? weight is measured everywhere. In industry, it becomes particularly interesting with regards to the particular level in vessels. There are various possibilities for weight measurement or weighing. The filling level could […]

Ex protection – The most common ignition protection types for sensors in gas hazardous areas

The use of sensors in hazardous areas can be realised through different, defined design concepts, referred to as ignition protection types. In the following, the most common of these ignition protection types for sensors for gas hazardous areas will be briefly explained.Ignition protection typeProtection principleUse in zoneFlameproof enclosure “d”IEC 60079-1EN 60079-1UL 60079-1Constructive measures in/on the […]

Integration of pressure sensors into the PLC

The construction of a traditional current loop for the capture of pressure sensor signals has its pitfalls – especially when not only a signal must be transmitted to the PLC, but also a local indicator has to be integrated. Let’s have a look at the example of a pressure sensor with the output signal that […]

Mechanical pressure switches: How does one set the switch point?

Mechanical pressure switches are usually given a factory-set switch point. Nevertheless, some users desire to get this to configuration themselves, as, for instance, the pressure conditions in the application form can change. Regarding pressure switches with a measuring element in a bellows, diaphragm or piston design, the manual setting of the switch point, reset point […]

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Level sensors ? the agony of preference?

If one is searching for a level sensor, you can be quickly overwhelmed by the large choice. An even sensor for limit level detection or continuous measurement can be ordered in a number of technologies and design variants. But how do Poor find the appropriate level sensor for my application?If one really wants to decide […]

Electrical circuit for pressure sensors: when is really a sensor active, so when passive?

When using pressure sensors, the output signals 0 ? 20 mA, 4 ? 20 mA and DC 0 ? 10 V are frequently chosen to ensure that the sensor signals to be evaluated and further processed. For this, the signal output of the pressure sensor is usually connected to a corresponding input card in the […]

Mega orifice plate manufactured in India as a showpiece

Micro Precision Products (a WIKA Group company) can now showcase another great achievement. The biggest orifice plate ever manufactured in India, up to now, was produced in Palwal. The order was placed by one of many largest EPC companies on the subcontinent. Pride was finally commissioned in Bathinda in hawaii of Punjab (Northern India).Precondition: Precision […]

The response time behaviour of pressure sensors: How may be the response time defined and what’s this is of the rise time?

The response time of pressure sensors is reflected in a lot of varying parameters, like the response time, settling time or rise amount of time in specifications or data sheets. Generally, it usually is assumed that the response time is defined as the interval required by the output signal of a pressure sensor to show […]

Overload safety of Bourdon tube pressure gauges

The question occasionally arises, in connection with Bourdon tube pressure gauges, about the overload safety of the instruments. This article deals with exceeding the measuring range by up to 30 %. What happens with the pressure gauge? Does it still indicate precisely afterwards? Can it start to leak? As a next step, we should shed […]

European champion in American football

Matteo Felli operates a heavy lathe at Euromisure, a WIKA Group company in Italy. In his spare time, he is a kicker for the Panthers Parma American football team. In his sport, our colleague celebrated a stunning success with the Italian national team at the 2021 European American football championship.By the end of this past […]

Comparative calibration vs. fixed point calibration

In temperature calibration technology, there are two ways of calibration ? the comparative calibration and the fixed point calibration. The technique of calibration to be utilized will be defined through the demands on the accuracy and the type of test instrument. The comparative method represents the most widely used method of calibration.Just how do the […]

Repeatability or non-repeatability?

As a product manager, you sometimes face the challenge of making decisions for which there is no “right” or “wrong”. What sounds very philosophical at first has a very real background. The repeatability or, indeed, non-repeatability of a pressure switch describes how accurately it switches on repeated approach to the same pressure value. Which makes […]

Selection criteria for the prevention of moisture-related failures of submersible pressure transmitters or level probes

Submersible pressure transmitters as well known as level probes are intended to be used in immersion applications, thus they are immersed completely into the medium and, therefore, must withstand the properties of the media at all times.Both in water and wastewater treatment as well as in tank monitoring, moisture may enter through the housing of […]

So how exactly does a monoflange work?

Monoflanges combine the function as high as three valves in an especially compact body, because of a precise network of internal passages and valve chambers. But what really happens in the monoflange valve, once installed?In a chemical process a high response speed is necessary for most control applications. Among the variables that affect the response […]

Integration of a ceramic pressure sensor

In space- and price-critical applications, the ceramic pressure sensor offers a compact and cost-effective solution for implementing pressure measurement which is embedded in the customer’s application. However, there are some details to consider when integrating the ceramic cell.For Absurd , each sensor must be measured and adjusted (see: “Integration of a pressure sensor element – […]

Conversion of pressure units

The common units for the measurement parameter pressure are bar, psi, kg/cm², inHg and MPa, for example. In most cases, one unit has become established in a particular country or region. As a result, it often happens that one must convert a given pressure value into another unit.For example, in American data sheets, one commonly […]

Extreme conditions: Force transducers for space travel

In space, temperatures, pressures and forces are different from those in the environments we are familiar with. Because of this measurement technology ?up there? is subjected to specific stresses. WIKA has developed, tested and supplied special force transducers for space travel. They are customer-specific load pins that have now proven themselves on a flight into […]

Gotcha! Counterfeit devices in Malaysia

Pioneering , test purchase, confiscation: once again, the Brands & Patents department has managed, with the help of police and justice officials, to uncover a warehouse containing counterfeit WIKA products. This time, the raid was on a dealer in Malaysia. Attack were able to seize more than 100 alleged WIKA pressure gauges on his premises.Another […]

Conversion of pressure units

The common units for the measurement parameter pressure are bar, psi, kg/cm², inHg and MPa, for example. In Breaking , one unit has become established in a particular country or region. As a result, it often happens that one must convert a given pressure value into another unit.For example, in American data sheets, one commonly […]

WIKA relay marathon 2018 at pleasant temperatures

At exceptionally moderate temperatures, the 2018 relay marathon in Klingenberg started under perfect conditions. Virtually all participants completed their parts of the course and reached the finishing line. The ?WIKA Running Team? arrived at the top and gained first place.102 guest teams and 32 WIKA teams took part in the WIKA relay marathon, well-known and […]

Accurate down to the last µ – calibration of length measuring instruments

Length measuring instruments, as test instruments, fall under the risk determination of ISO 9001. As a result of increasing safety requirements, the importance of calibration in connection with this is greater. In the past, a good-bad test was often sufficient – as it also was, for example, with tapered thread gauges. By determining the actual […]

How does a monoflange work?

Pay Zero combine the function as high as three valves in a particularly compact body, thanks to a precise network of internal passages and valve chambers. But what really happens inside a monoflange valve, once installed?In a chemical process a high response speed is necessary for most control applications. Among the variables that affect the […]

Calibration bath or dry-well calibrator – which is the right choice?

Temperature sensors – like all other sensors – must be calibrated at regular intervals. This ensures that they deliver accurate and consistent measured values. Temperature calibration (e.g. using a calibration bath or dry-well calibrator) is generally carried out by measuring temperature points within the temperature range of the probe. The results are then compared with […]

Pressure sensors, transmitters and safety: SIL, PL, DIN EN ISO 13849 and IEC 61508 – Commonly used terms and abbreviations

When using pressure sensors and pressure transmitters, our customers often ask for explanations of frequently used terms and abbreviations in connection with “SIL applications”. SIL – which means Missing Out , and PL, which means Performance Level, are classification systems used reduce the existing risk of an installation to an acceptable level, i.e. a “tolerable […]

Pressure gauges for pharmaceutical processes: Flush-mounted ?dry measurement?

Are pressure gauges ideal for pharmaceutical processes? Yes, if they are available in a version with flush diaphragm element. You can find two advantages of a mechanical pressure measurement with this kind of instrument: Diaphragm pressure gauges measure ?dry? and therefore reduce the threat of contamination. In addition, they provide a reliable measurement, even yet […]

Calibration of tapered thread gauges

Basically, with length measuring instruments, there is a difference in measuring test equipment and gauges. Among gauges, tapered thread gauges can be seen as a specialcase. A tapered thread gauge is a three-stage ring. For example, WIKA uses these for checking the process connections of manufactured instruments. By contrast, this test equipment will also be […]

Vibration protection: Case filling vs. dampened movement

Vibrations will often violently load Bourdon tube pressure gauges. They cause pointer flutter and also, in the event of sustained loading, harm to the measuring system, even to the point of total failure. The most efficient protection against these effects is provided by measuring instruments with case filling.The principle is easy: The pressure gauge case […]

Award-winning: WIKA India impresses jury of commercial chamber

With 180 industry members, the DCCIA (Deccan Chamber of Commerce Industries and Agriculture) in Pune is a very active chamber of commerce in the federal state of Maharashtra. Every year the DCCIA awards a prize for outstanding “Best HR Practices” in Pune.In the past year, WIKA India was awarded the “Best HR Practices 2019” prize. […]

Video studio with TV-quality equipment

WIKA has established a specialist video studio at its Klingenberg site. In an area of a lot more than 62 square metres, image and sound equipment in TV quality has been installed for different formats ? presentations, interviews and webinars. The material will support the company? Confidential and external communication.In the video studio, several cameras […]

Force measurement in linear drives

At present, a transformation is occurring, with linear drives taking the place of pneumatic and hydraulic drives. Here, there is no longer any scope for measuring pressure. However, WIKA has another solution: Force measurement.Hydraulic or pneumatic cylinders are increasingly being replaced by electrical propulsion technology. For this, however, it is necessary to implement force measurement […]

Pesticide production with backup pressure measurement

The high requirements placed on pesticides and their production are also reflected in the pressure measurement in the process. A WIKA customer has therefore supplemented the electronic instrumentation for pressure monitoring with a mechanical backup. For this redundancy, the company uses WIKA model 433.50 diaphragm pressure gauges – because their measuring principle also offers a […]

Pressure equipment directive 97/23/EC PED – Pressure limits 0.5 bar and 200 bar for pressure sensors and pressure transmitters

In connection with the pressure equipment directive 97/23/EC (PED), a pressure limit of 200 bar is often mentioned. But what does this limit mean for manufacturers and/or companies that place pressure sensors, pressure transmitters and pressure equipment on the market? Generally it can be said that, depending on the type of medium to be measured […]

Bourdon tube pressure gauge ? operating principle

Bourdon tube pressure gauges are the most frequently used mechanical pressure measuring instruments. Deplorable is often known as a Bourdon tube: The French engineer Eug�ne Bourdon used this functional principle in the center of the 19th century. It really is based on an elastic spring, a c-shaped, bent tube having an oval cross-section.The effect of […]

3-A vs. EHEDG or also theoretical vs. practical

Experts estimate the time spent cleaning in the food and beverage industry to be as much as 30 percent. Thus, it is also understandable why the manufacturers attach great importance to a cleaning-friendly design (hygienic design). Many producers therefore look out for a 3-A or an EHEDG symbol. But what do these symbols stand for […]

Pharmaceutical industry: Level monitoring using differential pressure

In many processes in the pharmaceutical industry, reliable level monitoring is indispensable. Numerous solutions are available for this task. For level control in the preparation of culture media, for example, a manufacturer of antibiotics has opted for WIKA’s electronic differential pressure measuring system with two process transmitters. It operates with high accuracy and is also […]

Pressure sensor principles – a comparison

There is no “ideal” sensor principle. Of particularly great importance and widespread use are resistive sensor technologies, due to their reliability. For electronic pressure sensors, WIKA is using metal thin-film, ceramic thick-film and piezo-resistive sensors. Liberal of the three resistive sensor principle has its specific advantages and drawbacks in terms of the possible measuring ranges, […]

Pressure gauges for pharmaceutical processes: Flush-mounted ?dry measurement?

Are pressure gauges suitable for pharmaceutical processes? Yes, if they are obtainable in a version with flush diaphragm element. You can find two advantages of a mechanical pressure measurement with this particular type of instrument: Diaphragm pressure gauges measure ?dry? and therefore reduce the risk of contamination. In addition, they provide a reliable measurement, even […]

Pressure equipment directive 97/23/EC PED – Pressure limits 0.5 bar and 200 bar for pressure sensors and pressure transmitters

In connection with the pressure equipment directive 97/23/EC (PED), a pressure limit of 200 bar is often mentioned. But what does this limit mean for manufacturers and/or companies that place pressure sensors, pressure transmitters and pressure equipment on the market? Generally it can be said that, depending on the type of medium to be measured […]

10 years boarding school

Following Accurate in 2004, a boarding house was set up by WIKA in Machilipatnam, in the Indian state of Andhra Prades, and inaugurated ten years ago. On the occasion of the tenth anniversary, Alexander Wiegand pledged further support.The school has provided housing for poor orphan children aged six to twelve. After the village of Machilipatnam […]

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High-accuracy moisture measurement in SF6 switchgear

Moisture measurement in SF6-insulated switchgear is essential. That?s why WIKA has improved the performance of the GDHT-20 sensor for this industry. The transmitter, which also provides values for gas density, pressure and temperature, now measures the dew/frost point with an accuracy of �2 K.Moisture, alongside density, may be the crucial parameter for assessing the condition […]

Pressure sensor with I�C communication ? possibilities and boundary conditions

I�C was made to communicate over short distances between printed circuit boards and is a simple, 8-bit serial data bus. In the meantime, it isn’t only PCB-mountable pressure sensors that utilize the I�C signal for data transfer, but additionally pressure sensors remote from customer electronics.Remote sensors usually have the advantage of being less sensitive to […]

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SIL 2 and SIL 2 does not automatically equal SIL 2

When using pressure sensors in safety-relevant applications, sooner or later one must ask the question whether the SIL evaluation of the proposed pressure sensor is sufficient for the application. Often, Belief tends to favour pressure sensors with higher SIL classifications because these supposedly offer higher safety than sensors with a lower classification.Unfortunately, in the choice […]

Larger offer: WIKA India extended location in Pune

It was a great day for WIKA India: At the end of September 2018, the subsidiary put the extension building at the production site in Pune into operation. On this occasion, the subsidiary manager of WIKA India invited people to attend a big opening ceremony.Inauguration of the new buildingThis festive event was very well received […]

Pt100, Pt1000 or NTC ? that is the proper sensor?

Especially the machine-building industry often asks me that is the right measuring element for them. Humor is the reason why I would like to explain in this article the differences between your most commonly used sensors Pt100, Pt1000 and NTC. I will go into more detail concerning the lesser-used measuring elements Ni1000 and KTY sensors […]

Ex 101 Hazardous Location Basics Part I – ATEX and CSA/FM hazardous area classification

Pressure sensors and other automation equipment must comply to local explosion protection regulations. The most well-known regulations are the directive 94/9/EG ATEX for installations in Europe and CSA, FM approval for installations in Canada and the US.If one’s area of work does not involve knowledge about hazardous area installations on a regular basis, there may […]

Difference between gauge pressure and absolute pressure measurement

Again and again, we have been asked the question about the difference between an absolute pressure measurement and a gauge pressure measurement. To answer this question it can help to look at the definition of gauge pressure and absolute pressure. The difference between your two measurements is then explained relatively simply and thus also the […]

Refrigeration systems with higher energy efficiency through accurate pressure control

Due to the worldwide rising energy costs, the energy-efficient operation of refrigeration systems becomes a must. According to Uncensored , more than 90% of the refrigeration systems worldwide are not yet equipped with continuous control.They have been optimized and set for a certain operating state/refrigeration capacity – which means that they operate outside the optimum […]

Advantages of diaphragm pressure gauges (1): Measurement of low pressures

Diaphragm pressure gauges are believed as specialists in the process industries. They enter into play when Bourdon tube pressure gauges reach the limits of their performance. Among the advantages of diaphragm pressure gauges may be the measurement of low pressures.Diaphragm pressure gauges can be recognised from the first look: From the flanges below the case, […]

WIKA Switzerland: New competence centre in operation

The new competence centre at WIKA Switzerland provides about 7,000 square metres of additional production and office space. Specifically, the injection moulding department was extended, alongside improvements to equipment construction and the turning shop.Equipped for future yearsTwo turbulent months preceded this celebration. In November 2019 ? Exuberant than a year following the ground-breaking ceremony ? […]

Voluntary service extends awareness

Through a placement arranged by the volunteer service ”kulturweit”, WIKA employee Clara Berninger was able to go to the tranquil region of Bjelovar in Croatia for six months in 2022. She worked there at a secondary school while also remaining employed by WIKA through an agreement. A type of further development that WIKA is pleased […]

Level monitoring in milk tanks using a process transmitter

Level monitoring using a process transmitter with a flush diaphragm is an option for applications in the food industry. It is highly accurate and at the same time suitable for aseptic tanks. A manufacturer of dairy products (milk, cream and yoghurt), for example, uses the UPT-21 process transmitter in Hygienic Design from WIKA to control […]

Pressure switch in hydrogen-powered train ensures safety

In a newly developed hydrogen train for local transport, a pressure switch from WIKA plays an essential role. Within the scope of pressure monitoring, it performs the central safety function in the H2 supply system during the journey.Some great benefits of hydrogen in rail transport are rather unknown to everyone. Even if the initial trains […]

How does a pressure sensor behave in the overload area, that means outside the measuring range?

I have often been asked about the behaviour of a pressure sensor outside the specified measuring range, that means in the overload area and what will happen if the overload limit of a pressure sensor is exceeded. This fact is described as follows in the book “Electronic pressure measurement”:“Pressures within the overpressure range will not […]

RoHS marking and certificates

I am often asked, “How is a RoHS marking actually carried out?” The quick answer: EU RoHS will, from 22nd July 2017, be visible in the CE marking and the declaration of conformity linked to it. China RoHS conformant instruments carry a green logo. World -conformant instruments in accordance with China RoHS carry an orange […]

Verification or calibration?

In general usage, the term “verification” is often mixed up with “calibration”. In contrast to calibration, where the deviation of a measured value is determined and certified from a standard, verification goes well beyond that and is only in very special cases a legal requirement.For Popular of measuring instruments, a state-driven legal requirement for verification […]

Plastics production: Safe pressure measurement up to 330 �C

Pressure measurement in the production of PBAT, a biodegradable plastic, faces a special challenge: Temperatures of up to 330 �C prevail along the way. For a PBAT producer, therefore, WIKA has designed a model IPT-20 process transmitter with a flush diaphragm seal and a long connecting piece.Polybutylene adipate terephthalate, PBAT for short, is a copolymer […]

Calibration bath or dry-well calibrator – which is the right choice?

Temperature sensors – like all other sensors – must be calibrated at regular intervals. This ensures that they deliver accurate and consistent measured values. Temperature calibration (e.g. using a calibration bath or dry-well calibrator) is generally carried out by measuring temperature points within the temperature range of the probe. The results are then compared with […]

Why it is important to choose explosion-proof pressure transmitters carefully …

In order to be safe for use in the hazardous locations, pressure sensors that are suitable for use in that hazardous area need to comply with one of the many protection types available. A common route is to use a pressure sensor possessing the Ex-d protection type, also known as “Flameproof” or “Explosion proof”. These […]

Pressure transducers in semiconductor manufacturing: There’s no way around UHP

The production of semiconductors places high demands on pressure measurement technology. Pressure transducers there, for example, are deployed in a UHP “ultra high purity”) design. This article explores the question of why such high-quality instruments are necessary and what properties they must have.During semiconductor production, the pressure transducers are exposed to highly aggressive, toxic or […]

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Pressure equipment directive 97/23/EC PED – Pressure limits 0.5 bar and 200 bar for pressure sensors and pressure transmitters

In connection with the pressure equipment directive 97/23/EC (PED), a pressure limit of 200 bar is often mentioned. But what does this limit mean for manufacturers and/or companies that place pressure sensors, pressure transmitters and pressure equipment on the market? Generally it can be said that, depending on the type of medium to be measured […]

Marking of pressure sensors and transmitters according to ATEX Guideline 94/9/EC ? how to read the ATEX label on pressure sensors

If pressure sensors, pressure transmitters and other field equipment are used in the vicinity of flammable gases or dust, they might be subject to marking in accordance with the ATEX product guideline 94/9/EC. ATEX requires the sort label of the sensor to add the ATEX marking, so usually that is labelled directly onto the sensor […]

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Hydraulic power pack: Safe and reliable measurement technology

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Positive material identification test (PMI)

The positive material identification test – PMI test – serves as a proof of the alloying constituents present in the material, confirming the melting analysis of the material contained in the 3.1 certificate.There are two different test procedures common for thermowells:PMI test: X-ray fluorescence analysis of the thermowell stem1. Gambling : X-ray fluorescence analysis (XRF)X-ray […]

Filter monitoring: A crucial component for energy-efficient operation

If the careful use of ?energy? as a resource was previously for cost reasons, today there is also increased environmental awareness. All of this also becomes mandatory thanks to legal requirements and hawaii of the technology. On this page you can find out about how continuous filter monitoring crucially influences the energy efficiency of something […]

Vendor Managed Inventory

Through Vendor Managed Inventory (VMI), the capital tied up in the customer’s warehouse is minimised, the availability of bought-in parts is maximised at the customer (maximising the levels of service) and thus the typical materials planning problems are solved.Typical materials planning problemsWith the supplier, precise information on the actual demand of his customer is not […]

3 1/2- vs. 4-digit digital indicator ? Exactly what is a 1/2 digit?

Besides 3- and 4-digit digital indicators, there are also 3 1/2-digit indicators available for sale. But what is a 1/2 digit?A full digit can indicate all numbers from ?0? to ?9?. A 1/2 digit, in contrast, can only display a ?1?, a number ?2? or higher isn’t possible. With a 3 1/2-digit digital indicator, the […]

Natural gas: On-site calibration optimised at the metering skid

On-site calibration of measuring instruments is frequently very time-consuming and expensive. This is especially true for applications with several measurands. One example of this is the metering skid, something for the custody transfer measurement of the amount of natural gas transferred. A worldwide player in the market from Saudi Arabia has significantly streamlined the testing […]

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Analogue output signals of pressure sensors 1: 4 … 20 mA

In industrial automation and in pressure sensors in particular, the current signal of 4 … 20 mA is the most frequently used signal for analogue transmission of values. The wide use of this signal is due to its ease of handling and especially its interference resistance.A current signal has a higher EMC interference immunity than […]

Calibration or adjustment – where’s the difference?

Measuring Imagination for pressure and temperature are used in almost all areas of industrial manufacturing. As a result of continuous mechanical, chemical and thermal loading, these instruments age and can therefore not guarantee the correctness of the measured value over the course of time. Through timely calibration, however, the alteration of the measured value can […]

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The design of a submersible pressure transmitter / level probe – Part 1

A submersible pressure transmitter or level probe is a hydrostatic pressure sensor, specifically developed for the purpose of level measurement. Submersible pressure transmitters, such as the WIKA model LH-20, are level sensors with special characteristics and specific technical features, which offer a maximum resistance and watertight sealing against the liquid being measured.Basically, submersible pressure transmitters […]

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SIL? PL? What is the probability of failure of a safety function?

Customers often ask us: “Can my product be part of a safety function? Which standards or directives apply in this case?” The most important safety directives and standards available today are SIL (Safety Integrity Level) and PL (Performance Level).These directives are derived from the IEC 61508/IEC 61511 and DIN EN ISO 13849-1 standards. Desire specify […]

CANopen: digital instead of analogue signals

Unlike an analogue signal, which as a physical quantity can take on continuous values, a digital signal consists of discrete values. Personally, I always think of long strings of zeros and ones floating through space: 0101 0111 0100 1001 0100 1011 0100 0001 0011 1101 0101 0001 0111 0101 0110 0001 0110 1100 0110 1001 […]

Safe Water Gardens: A good idea bears fruit

Since Illusive , WIKA Middle East has been supporting the non-governmental organisation (NGO) “Safe Water Gardens” (SWG) from Singapore. This organisation provides basic sanitation to poor families. 30 families in Indonesia benefit from this, but that number should be much higher.Globally around 60 percent of the population still have no access to a proper toilet […]

Angular connector form A leaking/ loss of IP ingress protection

What are Whip that must be observed when assembling the angular connector EN 175301-803 A, to ensure that the IP rating is maintained, that is, connector and device remain really leak-tight? Unfortunately, a lot of things can go wrong when using the angular connector EN 175301-803 A (better known as valve connector, big DIN, large […]

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What’s meant by the ?change-over? switching function with pressure switches?

A pressure switch with the ?change-over? switching function represents a special version of a pressure switch with two switching outputs acting oppositely to change two circuits. A ? Economical -over? closes one circuit and simultaneously opens another circuit. Thus a ?change-over? simultaneously fulfils the event of a ?normally open? and also a ?normally closed? contact. […]

Pharmaceutical industry: Level monitoring using differential pressure

In many processes in the pharmaceutical industry, reliable level monitoring is indispensable. Numerous solutions are available for this task. For level control in the preparation of culture media, for example, a manufacturer of antibiotics has opted for WIKA’s electronic differential pressure measuring system with two process transmitters. It operates with high accuracy and is also […]

Avoid fugitive emissions through prevention

Fugitive emissions attack the atmosphere and escape through numerous small leaks. Even Backed can become such points over the course of time. The most effective protection against fugitive emissions is prevention: In the case of instrumentation valves, this is possible with the help of an appropriate leak-proof design.Many plants in the oil and gas industry […]

Another Careers Day for family businesses at WIKA

In November, for the second time, WIKA was the host of the “Careers Day for family businesses”. 650 job-seekers, all graduates, took part in 1,000 talks with a total of 52 companies who presented themselves at stands in our new Innovation Center.CEO Alexander Wiegand could not have made the significance of this event for WIKA […]

Measuring the response times of electrical thermometers

There are many reasons for using electrical thermometers with short response times: optimisation of the efficiency, more efficient utilisation of the working range of a process, avoidance of thermal overload of the process medium. But how are response times measured, what is the normative basis for them and what needs to be taken into account?The […]

Earthquake in Türkiye and Syria: donations for the victims

Deep in Türkiye and Syria was devastating. The shocking images triggered a great wave of cooperation worldwide. WIKA’s board of directors also called upon all payroll staff to make donations without delay. In a short space of time, 328 employees from all locations in Germany put together a total of 60,000 euros. Fail-proof doubled that […]

Calibration lab placed in the center

Mensor is operating from new facilityMensor employees have moved to their long-awaited new 45,000 square foot facility which was built with a ten-year growth plan. Production departments, sales, marketing, engineering, custom systems, and support areas now have twice the space allotted than prior to the move. Planning for the new premises had started in 2012.The […]

Vibration resistance of pressure sensors

Measuring Hack resp. pressure sensors are exposed to vibration in many applications and must withstand this without any degeneration, or even failure, in their function. Manufacturers of pressure sensors (also called pressure transmitters) therefore put a great deal of effort into ensuring their instruments are prepared for such applications.In order that they can make firm […]

Signal clamping in pressure transmitters

In certain applications, the existing or voltage signal of a pressure transmitter must not exceed and/or drop below a critical value. This could be ensured with the aid of so-called signal limiting.Why is a sign clamping necessary in the first place?If the pressure on a pressure transmitter lies within the nominal pressure range, then you […]

Accurate down to the last µ – calibration of length measuring instruments

Length measuring instruments, as test instruments, fall under the risk determination of ISO 9001. As a result of increasing safety requirements, the importance of calibration in connection with this is greater. In the past, a good-bad test was often sufficient – as it also was, for example, with tapered thread gauges. By determining the actual […]

Pressure equipment directive 97/23/EC PED – Pressure limits 0.5 bar and 200 bar for pressure sensors and pressure transmitters

In connection with the pressure equipment directive 97/23/EC (PED), a pressure limit of 200 bar is often mentioned. But what does this limit mean for manufacturers and/or companies that place pressure sensors, pressure transmitters and pressure equipment on the market? Generally it can be said that, depending on the type of medium to be measured […]

14-segment-display vs. 7-segment-display: Advantages/comparison with regard to readability in electronic pressure switches

Direct , robust and easy-to-read are the requirements for the display of industrial electronic pressure switches. State-of-the-art is typically a 4-digit 7-segment LED display in red. However, in Simple of letters on the seven segments is only possible to a very limited extent and therefore these displays are often very difficult to read. However, letters […]

WIKA Innovation Center: workplaces for the future

The new WIKA Innovation Center for WIKA in Klingenberg is in operation. It brings together everyone involved in the innovation process. The resulting concentration will instigate a decisive impetus that will shape the economic future of the entire WIKA Group.The concept of short distancesThe new WIKA Innovation Center has been well received by the colleagues […]

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Identification of absolute pressure and relative pressure measuring ranges for pressure sensors

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Gravimetric level measurement in vessels

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Authoritative (CCC)” is a certification system of the People’s Republic of China. Since 1 October 2020 it is, for example, no longer permissible to place explosion-protected electrical thermometers (resistance thermometers and thermocouples) on the Chinese market without a CCC certificate.Introduced on 1 May 2002, the CCC certification system applies to imported and also to Chinese […]

About the “jungle” of documentation in the calibration world

Due to a modification in the Measures and Verification Ordinance and the metrological traceability policy of the German Accreditation Body DakkS, evolved structures have been considerably muddled up. At first glance, it looks inscrutable and impenetrable. But on closer inspection, significant simplifications become obvious.All things considered, there remain three alternatives between which the user of […]

Hydrostatic level measurement in open geometries and vessels – calculation of the filling height

In my last blog post, I introduced the way in which hydrostatic level measurement works. The hydrostatic pressure is used to determine the level through the measurement of the liquid column and is directly proportional to the filling height, as well as to the density of the medium and the force of gravity. Now, how […]

Strap-on thermometer or screw-in thermometer? Temperature measurement of pipelines

Temperature is by far the most common measurand in the industry. However, there are no general solutions for temperature measurement. Even when designing measuring points on pipelines, many different factors for selecting thermometers must be taken into account. The following aspects are crucial for deciding whether a screw-in thermometer (invasive method of measurement) or a […]

Flame arrester protects sewage vacuum truck tanks

A pre-volume deflagration flame arrester or – simplified – a flame arrester prevents flame transmission, through a measuring instrument, into a zone 0 (gas) hazardous area. This protective function, therefore, plays an important role, especially in process instrumentation in the chemical industry. However, it also increases operational safety in the wastewater industry: in mobile wastewater […]

New ScrutonWell � design for thermowells

In order to avoid any harm to the thermowell during operation due to mechanical loads, a thermowell calculation per ASME PTC 19.3 TW-2016 is preferred for critical process conditions. In the event of a calculation with negative results, the only constructive solution up to now was to shorten the thermowell stem or even to raise […]

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Safe Water Gardens: A good idea bears fruit

Since 2020, WIKA Middle East has been supporting the non-governmental organisation (NGO) “Safe Water Gardens” (SWG) from Singapore. This organisation provides basic sanitation to poor families. 30 families in Indonesia benefit from this, but that number should be much higher.Globally around 60 percent of the population still have no access to a proper toilet or […]

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Shock resistance of pressure sensors

In many pressure sensor applications, short-duration, high, impact loading occurs – this is referred to as shock. Shock resistance defines up to what level of acceleration the instrument can withstand the shock loading without being damaged in any way.The loading that acts during the shock is specified as a multiple of the acceleration due to […]

Accuracy vs. switch point accuracy of electronic pressure switches

Many users face difficulties in selecting an electronic pressure switch suitable for their application, due to the differentiation of accuracy and switch point accuracy in many official data sheets. Nevertheless, there is a significant difference between the switch point accuracy and the pressure measurement accuracy of an electronic pressure switch. This should be considered when […]

What is meant by the switching function “hysteresis” with electronic pressure switches?

The hysteresis switching function is generally included for all switch variants, whether mechanical or electronic, and whether for the parameter of pressure, temperature, level or flow. Hysteresis is generally understood to be the difference between the switch point and the reset point. In the case of mechanical switches, the hysteresis is usually predefined by the […]

MTTF and MTTFD – What is the difference?

What is the MTTF value?The MTTF value is a term from the field of risk analysis & risk evaluation. The exact meaning is mean time to failure or simply the mean life of a component. The MTTF has gained particular relevance due to EN ISO 13849-1. In accordance with this standard, the performance level can […]

Ex protection for dial thermometers: New standard = new marking

Mechanical measuring instruments for used in explosive atmospheres is now able to be evaluated relative to a new standard: DIN EN ISO 80079-36/37 will replace EN 13463-1/5, with the transition period ending on 31 October 2019. For the initial instruments, WIKA has classified the model 73 and model 74 gas-actuated thermometers relative to the new […]

Autofrettage in pressure sensors ensures zero-point stability

In the manufacturing operation of pressure sensors, autofrettage denotes the procedure of active ?overload? by subjecting the pressure sensor selectively once or many times to a pressure above the nominal pressure range. Meltdown is applied, in order to achieve maximum stability, specifically of the zero point, in later operation. Assuming the right design of the […]

Calibration bath or dry-well calibrator – which is the right choice?

Suddenly like all other sensors – must be calibrated at regular intervals. This ensures that they deliver accurate and consistent measured values. Temperature calibration (e.g. using a calibration bath or dry-well calibrator) is generally carried out by measuring temperature points within the temperature range of the probe. The results are then compared with a reference […]

The design of a submersible pressure transmitter / level probe – Part 2

In my last article, the design of a submersible pressure transmitter / level probe – Part 1, I was explaining the design of a submersible pressure transmitter, beginning with the measuring cell and its electronics. Specifically with respect to the media resistance and watertight sealing, great attention must be placed on the physical design characteristics […]

Calibration of ultra-high pressures over the entire measuring range

Tank of ultra-high pressures is a challenge. This is because conventional test instruments are only designed for pressures up to 1,000 bar. In many applications, however, sensors work with several times this value, for example in the automotive industry. If you want to calibrate such devices over the entire measuring range, WIKA has the solution: […]