illustration: relative and absolute pressure

In previous articles about the fields of application of different pressure sensors, I have described the special features of the different versions. Pressure range and ambient conditions are decisive when selecting a suitable sensor for a problem to be solved.

In smaller measuring ranges (e.g. < 10 bar), it is important to know whether a vented gauge pressure, non-vented gauge pressure or absolute pressure sensor is used because, with a process pressure of 10 bar, the indication of the measured value (1.23/10 bar x 100 % = 12.3 % measurement uncertainty) moves between 8.77 bar and 11.23 bar based on the selected reference point (0 or 1 bar) and the varying ambient pressure (+/- 230 mbar).

In case of very high pressures (e.g. > 1000 bar), it is becoming less and less important to know which sensor type is used because the maximum error of 1.23 bar only leads to a measurement uncertainty of 1.23 bar / 1000 bar x 100% = 0.123 %. The fields of applications described here are only a few selected examples of the sometimes very different fields of application of the different pressure sensors and show that, in each case, the specific accuracy requirements and ambient conditions must be considered.


Overview applications pressure sensor


More articles about this topic:
Fields of application for pressure sensors 1 – vented gauge pressure sensors
Fields of application for pressure sensors 2 – non-vented gauge pressure sensors

Fields of application for pressure sensors 3 – absolute pressure sensors

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