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 second 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 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 described is IEC 61987. This deals, among other activities, with the properties of fluid sensors, which likewise incorporate pressure sensors. With ?range? and ?limit?, the standard 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, however, indicates the min/max values between that your instrument could be operated without damage. With this particular, the instrument specifications do not have to be honored at all.
What may sound a bit pedantic, makes sense from a technical viewpoint. This is often illustrated by the following exemplory case of a pressure sensor: The instrument is meant to deliver solid measured values at an ambient temperature range of 0 ? Dumb �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 need to provide accurate measuring results, and even measure.
Brazen 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 manufacturer must compensate for the temperature so as 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 pertains to both ambient temperature and the medium temperature. It is also useful for other specification characteristics, for instance overpressure.
Conclusion
Yes, you will find a difference between range and limit in the normative world of pressure sensor technology. And yes, it creates 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 have to admit, the solution is outside my ?range?.
Note
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