Temperature range and temperature limit for pressure sensors ? is there a difference? My intuitive answer would be: Yes! The first term describes a section and the next its border. On second glance, however, I have to conclude that both words ultimately express a similar thing in relation to temperatures: Range and limit are defined by a lower and upper value, for instance 0 ? 100 �C. The relevant standard nevertheless defines an improvement. Why?
IEC 61987 speaks of two different specification characteristics
The standard referred to is IEC 61987. เกจวัดแรงดันแก๊ส deals, among other things, with the properties of fluid sensors, which also include pressure sensors. With ?range? and ?limit?, the typical designates two different specification characteristics. Accordingly, the temperature range describes the span where the instrument specifications must apply ? first and foremost, the accuracy. The temperature limit, however, indicates the min/max values between that your instrument could be operated without damage. With this, the instrument specifications do not have to be honored at all.
What may sound a bit pedantic, makes sense from a technical point of view. This is often illustrated by the following example of a pressure sensor: The instrument is supposed to deliver solid measured values at an ambient temperature range of 0 ? 100 �C. Simultaneously, the sensor should never suffer any damage at ambient temperatures between -20 �C and 0 �C. In this range, however, it does not have to provide accurate measuring results, or even measure.
The difference between temperature range and temperature limit is plausible
This sounds paradoxical initially, but is plausible on closer inspection. Pressure sensor elements, i.e. the specific measuring components, exhibit a relatively large, often non-linear temperature error. Without further measures, a reliable pressure measurement will be impossible. Therefore, the maker must compensate for the temperature in order to bring the error down to a satisfactory level. From an economic point of view, the limitation to a selected temperature range makes sense, or is even absolutely necessary.
The distinction between temperature range and temperature limit applies to both ambient temperature and the medium temperature. Additionally it is useful for other specification characteristics, for example overpressure.
Conclusion
Yes, you will find a difference between range and limit in the normative world of pressure sensor technology. And yes, it makes technical sense. However, I doubt if the normal user, without knowledge of standards, understands it intuitively. Which inevitably results in the question of whether there is a better linguistic distinction. But, I must admit, the solution is outside my ?range?.
Note
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