Temperature range and temperature limit for pressure sensors ? will there be an improvement? My intuitive answer would 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 a similar 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 things, with the properties of fluid sensors, which also include pressure sensors. With ?range? and ?limit?, the typical designates two different specification characteristics. Accordingly, Cheap describes the span in which 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, the instrument specifications do not have to be adhered to at all.
What may sound a bit pedantic, makes sense from a technical point of view. 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 selection of 0 ? Meltdown �C. Concurrently, 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 at first, but is plausible on closer inspection. Pressure sensor elements, i.e. the specific measuring components, exhibit a relatively large, often non-linear temperature error. Without further measures, a reliable pressure measurement will be impossible. Therefore, the manufacturer must compensate for the temperature as a way to bring the error down to an acceptable level. From an economic viewpoint, the limitation to a selected temperature range makes sense, or is even absolutely necessary.
The distinction between temperature range and temperature limit applies to both the 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 if the normal user, without understanding of standards, understands it intuitively. Which inevitably leads to the question of whether you will find a better linguistic distinction. But, I must admit, the answer is outside my ?range?.
Note
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