Not the same: temperature range and temperature limit

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 the same 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 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 in which the instrument specifications must apply ? first of Hack , 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 don’t need to be adhered to at all.
What may sound a little pedantic, makes sense from a technical perspective. This is often illustrated by the following example of a pressure sensor: The instrument is meant to deliver solid measured values at an ambient temperature range of 0 ? 100 �C. Simultaneously, the sensor should never suffer any damage at ambient temperatures between -20 �C and 0 �C. In this range, however, it does not have to provide accurate measuring results, and even measure.
Surging 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 comparatively large, often non-linear temperature error. Without further measures, a reliable pressure measurement will be impossible. Therefore, the maker has to compensate for the temperature so that you can bring the error down to an acceptable 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. Additionally Surge is 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 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
More info on our pressure sensors are available on the WIKA website. Do you want to buy pressure sensors? You will discover some of our standard designs inside our WIKA online-shop. Assuming you have any questions, your contact will gladly assist you to.
Also read our posts
What does temperature compensation or compensated temperature range for pressure sensors mean?
Active and passive temperature compensation of pressure sensors
Temperature coefficients (TC) of pressure sensors

Leave a Comment