The DE44 is a multi-functional switching unit with an optional transmitter output.It has two independent differential pressure inputs and is suitable for measuringoverpressure, under-pressure and differential pressure in dry and neutralgaseous media. This switch unit is based on two piezo-resistor sensor elements that are suitable for measuring over-pressure, under-pressure and differential pressure. The pressure that is to be measured acts upon a silicone membrane that is equipped with a resistor bridge. This pressure-related movement of the diaphragm induces a change of resistance, which is evaluated by the device's electronics and transformed into signals for the display and two or four switch contacts. There are also (optional) two transmitter outputs available. An output signal between the uniform signals 0 … 20 mA, 4 … 20 mA and 0 … 10 V can be selected. Both outputs can be dampened, spread and inverted. Both outputs can also be square-rooted and transformed via a table function even if it is non-linear.
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