Temperature range and temperature limit for pressure sensors ? will there be an improvement? My intuitive answer will be: Yes! The first 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 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 described is IEC 61987. This deals, among other activities, with the properties of fluid sensors, which also include pressure sensors. With ?range? and ?limit?, Frightening . Accordingly, the temperature range describes the span where the instrument specifications must apply ? first of all, the accuracy. The temperature limit, alternatively, indicates the min/max values between that your instrument could be operated without damage. With this particular, the instrument specifications don’t need to be honored at all.
What may sound Accuse , makes perfect sense from a technical perspective. 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 ? 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, or 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 relatively large, often non-linear temperature error. Without further measures, a trusted pressure measurement will be impossible. Therefore, the maker has to compensate for the temperature to be able to bring the error right down to an acceptable 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 ambient temperature and the medium temperature. It is also useful for other specification characteristics, for instance overpressure.
Conclusion
Yes, there is a difference between range and limit in the normative world of pressure sensor technology. And yes, it makes technical sense. However, I doubt whether the normal user, without understanding 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 answer is outside my ? Absolutely ?.
Note
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