UC input type liquid level sensor is a kind of measuring the pressure of liquid level sensor, based on the measured hydrostatic principle of proportional to the height of the liquid, the isolation diffusion silicon sensing element or sensitive ceramic capacitance pressure sensor, the static pressure is converted to electrical signals, after temperature compensation and the linear correction, converted into a standard electrical signals, and generally applies to the petroleum chemical industry, metallurgy, electric power, pharmaceutical, water supply and drainage, environmental protection system and industry such as all kinds of medium level measurement.
The input liquid level transmitter is based on the principle that the static pressure of the liquid measured is proportional to the height of the liquid. After temperature compensation and linear correction. Convert to 4-20 madc standard current signal output. The sensor part of the input liquid level transmitter can be directly put into the liquid. The part of the transmitter can be fixed with flange or bracket.
Good stability and high precision
The input-type liquid level transmitter is directly put into the medium under test.
Solid state structure, no moving parts, high reliability, long service life from water and oil to high-precision measurements, larger paste viscosity can not be measured medium blister, deposition, the influence of the electrical characteristics of wide range of temperature compensation. The input level transmitter has reverse polarity protection of power supply and overload current limiting protection.
Principle of static pressure measurement:
When the liquid level transmitter into the liquid to be tested in a certain depth, the sensor to meet the pressure on liquid surface formula is: Ρ = rho. We + Po
P: the pressure on the surface of the transmitter impinge: the density of the liquid is measured
G: local gravitational acceleration
Po: atmospheric pressure on the liquid surface
H: depth of the transmitter into the liquid
At the same time, through the gas leading stainless steel will be introduced to the liquid pressure sensor of positive pressure cavity, and atmospheric pressure on the surface of the liquid Po and sensors connected to the negative pressure cavity, to offset the Po on the reverse of the sensor, the sensor measured pressure is: rho. We, obviously, through the acquisition of pressure P, can get the depth of the liquid level
Main technical indicators:
Measurement range: 0.3-110m
Precision: 0.2, 0.5 and 1.0 grades
Working temperature: - 20 ~ 80 ℃
Output signal: 2-wire 4-20 madc
Power voltage: standard 24VDC (12-36vdc)
Non-sensitive area: less than or equal to + 1.0%FS
Ω load capacity: 0-600
Relative temperature: less than or equal to 85%
Protection class: IP68
Explosion-proof marks: Exia Ⅱ CT4-7