The Difference between Pressure Transmitter and Level Transmitter

Pressure transmitters and level transmitters are two kinds of sensors that we commonly use, but the connection and difference between them are little known. Knowing the difference between pressure transmitters and level transmitters will help us to choose suitable models for specific applications.

The measurement principles of our pressure transmitter UPB13 model and level transmitter ULB16-a model are similar. Both can input a certain depth in the medium measured. 

The calculation formula for the pressure in a fluid is: P=ρ.g.H+Po.

In the formula: 

ρ: density of the fluid;

g: acceleration of gravity;

H: depth of the fluid;

Po: the atmospheric pressure.

The liquid pressure is introduced into the positive pressure chamber of the transmitter by the membrane, and then the atmospheric pressure Po on the liquid surface is connected to the negative pressure chamber of the transmitter. When compensating for Po at the rear of the transmitter, the pressure measured by the transmitter is: ρ.gH. 

Obviously, by measuring the pressure P, the liquid level depth can be obtained. The output of our pressure transmitter UPB13 is pressure P, and the output of level transmitter ULB16-a is depth H.

For product details, please contact Stella Meng.