Liquid level transmitter principle

Many people don't know much about the principle of liquid level transmitter, so about more principles, Xi'an Huaheng Instrument Manufacturing Co., Ltd. will explain to you:

The liquid level sensor is widely used in the field of automobile fuel tank, real-time monitoring and measurement of pool liquid level, etc. It is mainly used in the field of high-low-level measurement of liquid level, which is mainly based on the principle that the liquid level is linear with the liquid bottom pressure. Yes, the liquid level transmitters have different brands and many forms, but how they change cannot be separated from their working principles.

Let's take a look at the principle of the lower level conveyor so that we can choose the right level transmitter correctly:

The principle of static pressure measurement: When the liquid level transmitter is put into a certain depth of the liquid surface, the principle formula is: Ρ=ρ.g.H+Po:

The pressure on the liquid surface of the transmitter

Measured liquid density ρ

Local gravitational acceleration g

Liquid level atmospheric pressure Po

The depth of the transmitter into the liquid H

At the same time, the pressure of the liquid is introduced into the positive pressure chamber of the sensor through the gas-conducting stainless steel, and the atmospheric pressure Po on the liquid surface is connected with the negative pressure chamber of the sensor to offset the Po on the back of the sensor, so that the pressure measured by the sensor is: ρ. gH, obviously, by measuring the pressure P, the liquid level depth can be obtained.