Temperature range and temperature limit for pressure sensors ? will there be a difference? 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 in relation to temperatures: Range and limit are defined by 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. Imminently 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 and foremost, the accuracy. The temperature limit, alternatively, indicates the min/max values between that your instrument may be operated without damage. With this particular, the instrument specifications do not have to be adhered to at all.
What may sound a bit pedantic, makes perfect sense from a technical point of view. This can be illustrated by the next example of a pressure sensor: The instrument is supposed to deliver solid measured values at an ambient temperature selection of 0 ? 100 �C. As well, 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.
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 reliable pressure measurement will be impossible. Therefore, the maker must compensate for the temperature as a way to bring the error down to a satisfactory level. From an economic viewpoint, the limitation to a selected temperature range is practical, or is even essential.
The distinction between temperature range and temperature limit pertains to both the ambient temperature and the medium temperature. It is also used 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 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 ? Embarrassed ?.
Note
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