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2. Design and function
2. Design and function
2.1 Overview
EN
Display and operating unit
Case head
Sensor housing
2.2 Description
The pressure in the sensor tube generates a signal which is processed by the integrated
evaluation electronics and converted into a current signal or a HART
can be used for the evaluation, control and regulation of the process.
The sensor tube is a base body that deforms under pressure load in a controlled manner.
This allows the principle of resistive pressure measurement to be used, in which the
pressure-dependent extent of the deformation is measured with 4 metal strain gauges.
If the sensor tube deforms under the influence of pressure, the strain gauges are also
deformed correspondingly. The electric resistance increases or decreases proportion-
ally to the deflection (elongation or compression). To accurately measure the resistance
change, the strain gauges are wired to a Wheatstone bridge.
8
Support tube
Sensor tube
Process connection
WIKA operating instructions, model DMSU22SA
signal. This signal
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