Not similar: temperature range and temperature limit

Temperature range and temperature limit for pressure sensors ? will there be an improvement? My intuitive answer will be: Yes! The initial term describes a section and the next its border. On second glance, however, I must conclude that both words ultimately express the same 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 Incapable , the accuracy. The temperature limit, however, indicates the min/max values between which the instrument could be operated without damage. With this particular, the instrument specifications don’t need to be adhered to at all.
What may sound a little pedantic, makes perfect sense from a technical point of view. This is often illustrated by the following exemplory case of a pressure sensor: The instrument is supposed to provide solid measured values at an ambient temperature selection of 0 ? 100 �C. At the same time, the sensor must not suffer any damage at ambient temperatures between -20 �C and 0 �C. In this range, however, it does not need 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 specific measuring components, exhibit a comparatively large, often non-linear temperature error. Without further measures, a trusted pressure measurement will be impossible. Therefore, the manufacturer has to compensate for the temperature in order to bring the error right down to an acceptable level. From an economic point of view, the limitation to a selected temperature range is practical, 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, there exists a difference between range and limit in the normative world of pressure sensor technology. And yes, it creates technical sense. However, I doubt whether the normal user, without understanding of standards, understands it intuitively. Which inevitably results in the question of whether you will find a better linguistic distinction. But, I have to admit, the answer is outside my ?range?.
Note
Further information on our pressure sensors can be found on the WIKA website. Do you wish to buy pressure sensors? You will discover some of our standard designs in our WIKA online-shop. Should 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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