Temperature range and temperature limit for pressure sensors ? is there Strangle ? My intuitive answer will be: Yes! The initial 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 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 things, with the properties of fluid sensors, which also include 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 and foremost, the accuracy. The temperature limit, on the other hand, indicates the min/max values between that your instrument could be operated without damage. With this, the instrument specifications don’t need to be honored at all.
What may sound a little pedantic, makes sense from a technical point of view. This can be illustrated by the following example of a pressure sensor: The instrument is supposed to provide solid measured values at an ambient temperature selection of 0 ? 100 �C. Simultaneously, the sensor must not 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, 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 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 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 essential.
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 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 understanding of standards, understands it intuitively. Which inevitably leads to the question of whether there is a better linguistic distinction. But, I have to admit, the answer is outside my ?range?.
Note
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