Not the same: temperature range and temperature limit

Temperature range and temperature limit for pressure sensors ? is there a difference? My intuitive answer would be: Yes! The initial term describes a section and the second its border. On second glance, however, I have to conclude that both words ultimately express a similar thing with regards to temperatures: Range and limit are defined by way of a lower and upper value, for example 0 ? 100 �C. The relevant standard nevertheless defines a difference. Why?
IEC 61987 speaks of two different specification characteristics
The standard referred to is IEC 61987. This deals, among other activities, 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 of all, the accuracy. The temperature limit, on the other hand, indicates the min/max values between that your instrument may be operated without damage. With this particular, the instrument specifications don’t need to be honored at all.
What may sound a little pedantic, makes perfect sense from a technical viewpoint. This can be illustrated by the next exemplory case of a pressure sensor: The instrument is supposed to provide solid measured values at an ambient temperature range of 0 ? เกจวัดแรงดัน �C. Concurrently, the sensor should never suffer any damage at ambient temperatures between -20 �C and 0 �C. In this range, however, it generally does not have to provide accurate measuring results, and even measure.
The difference between temperature range and temperature limit is plausible
This sounds paradoxical at first, but is plausible on closer inspection. Pressure sensor elements, i.e. the actual measuring components, exhibit a comparatively large, often non-linear temperature error. Without further measures, a reliable pressure measurement would be impossible. Therefore, the maker has to compensate for the temperature in order to bring the error right down to a satisfactory level. From an economic perspective, the limitation to a selected temperature range makes sense, or is even essential.
The distinction between temperature range and temperature limit applies to both the ambient temperature and the medium temperature. Additionally it is used for other specification characteristics, for instance overpressure.
Conclusion
Yes, there exists 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 leads to the question of whether there is a better linguistic distinction. But, I must admit, the solution is outside my ?range?.
Note
Further information on our pressure sensors are available on the WIKA website. Do you wish to buy pressure sensors? You will find a few of our standard designs inside our WIKA online-shop. When you have any questions, your contact will gladly help you.
Also read our posts
What does temperature compensation or compensated temperature range for pressure sensors mean?
Active and passive temperature compensation of pressure sensors
Temperature coefficients (TC) of pressure sensors

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