How the liquid level sensor works


Using the principle of static pressure measurement: when the liquid level transmitter is put into a certain depth in the measured liquid, the pressure formula on the liquid surface of the sensor is: Ρ=ρ.g.H+Po In the formula: P: transmitter The pressure on the liquid surface ρ: the density of the liquid to be measured g: the local acceleration of gravity Po: the 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 chamber of the sensor through the air-conducting stainless steel, Then connect the atmospheric pressure Po on the liquid surface 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.g.H. Obviously, by measuring the pressure P, the liquid level depth can be obtained.