Pressure level transmitter
Pressure type liquid level transmitters are made of advanced isolated diffusion silicon sensitive components, and can be directly measured in the container or water body to accurately measure the height of the water level gauge to the water surface, and the water level value can be passed through 4-20mA current or RS485. The signal is output externally.
Pressure type liquid level transmitter DATA-5111 is widely used in water supply and drainage, sewage treatment, groundwater, reservoir, river, ocean and other water level monitoring areas.
How it works
The principle of static pressure measurement:
When the liquid level transmitter is put into a certain depth in the liquid to be measured, the pressure formula of the sensor liquid receiving surface is: Ρ = ρ .g.H + Po
In the formula:
P : Pressure on the transmitter's flooding surface
ρ: measured liquid density
g : local gravitational acceleration
Po : atmosphere pressure
H : Depth of Transmitter Input Fluid
At the same time, the pressure of the liquid is introduced into the positive pressure chamber of the sensor by gas-guiding stainless steel, and then the atmospheric pressure Po on the liquid surface is connected with the negative pressure chamber of the sensor to cancel 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 depth of the liquid level can be obtained.