Principle of static pressure measurement: When the liquid level transmitter is inserted into a certain depth of the measured liquid, the pressure formula on the sensor facing the liquid surface is: Ρ=ρ. g.H+Po, where:

P: The pressure exerted on the liquid surface of the transmitter

ρ: Density of the tested liquid

g: Local gravity acceleration

Po: Atmospheric pressure on the liquid surface

H: Depth of liquid input into the transmitter

At the same time, the pressure of the liquid is introduced into the positive pressure chamber of the sensor through gas guiding stainless steel, and the atmospheric pressure Po on the liquid surface is connected to the negative pressure chamber of the sensor to offset the Po on the back of the sensor,

The pressure measured by the sensor is: ρ. g.H, obviously, by measuring the pressure P, the depth of the liquid level can be obtained.

Features:

Good stability, with long-term stability of up to 0.1% FS/year at full and zero positions. Within the compensation temperature range of 0-70 ℃, the temperature drift is less than 0.1% FS, and within the entire allowable operating temperature range, it is less than 0.3% FS.

◆ Equipped with reverse protection and current limiting protection circuits, the transmitter will not be damaged if the positive and negative poles are reversed during installation. In case of abnormalities, the transmitter will automatically limit the current to within 35MA.

Solid state structure, no movable parts, high reliability, long service life.

Easy installation, simple structure, economical and durable.