The pressure transmitter measures the gauge pressure as well as the level of liquids and gases.
Mode of operation
SITRANS P220 pressure transmitters (7MF1567-...), functional diagram
The stainless steel measuring cell has a thick-film resistance bridge to which the operating pressure p is transmitted through a stainless steel diaphragm.
The voltage output from the measuring cell is converted by an amplifier into an output current of 4 to 20 mA or an output voltage of 0 to 10 V DC.
The output current and voltage are linearly proportional to the input pressure.