Static pressure measurement principle:
When the liquid level transmitter is put into a certain depth in the measured liquid, the pressure formula of the sensor facing the liquid surface is: Ρ=ρ.g.h + Po
P: Pressure on the liquid surface of transmitter
RHO: Measured liquid density
G: Local Gravity acceleration
Po: Atmospheric pressure on the liquid surface
H: The depth of the transmitter into the liquid
At the same time, the pressure of the liquid is introduced into the positive pressure cavity of the transducer by the air conduction stainless steel. Then the pressure PO on the liquid surface is connected with the negative pressure cavity of the sensor to counteract the PO on the back of the sensor, so that the sensor can be measured by: ρ.g.h, it is obvious that the level depth is obtained by measuring the pressure P.