Absolute pressure cells
In absolute pressure cells the vacuum generated during the manufacturing process remains between the diaphragm and the base body, i.e. the sensor measures the pressure in relation to the vacuum as a reference point. Absolute pressure measurement is selected to eliminate the influence of varying atmospheric air pressure.
Relative pressure cells
With relative pressure cells the back of the membrane is vented, i.e. the sensor measures the positive pressure relative to atmospheric pressure.
Compound pressure cells
Compound pressure cells allow a relative measurement with vacuum range..
Measuring ranges:
A large selection of measuring ranges, i.e. the difference between lower and upper maximum value (e.g. -1…2 BAR / -1…9 BAR / 0…2 BAR / 0…40 BAR) allow a specific and precise adaptation to all process conditions. Even very low pressures up to 0…0.04 BAR are possible by turn-down.
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