Level Transmitter

The liquid level transmitter is based on the principle that the measured static pressure of the liquid is proportional to the height of the liquid. It uses the piezoresistive effect of diffused silicon or ceramic sensitive elements to convert the static pressure into an electrical signal. After temperature compensation and linear correction, it is converted into a standard current signal output. The sensor part of this product can be directly put into the liquid, and the transmitter part can be fixed with a flange or bracket, making it extremely convenient to install and use. Liquid level transmitters are mainly used in industrial on-site liquid level measurement and control in urban water supply and sewage treatment, petrochemical power plants, hydrological monitoring, reservoirs, dams, hydropower construction and other fields.
Product features of liquid level transmitter
Good stability, high precision, high performance/price ratio
Directly put into the measured medium, very convenient to install and use
Solid structure, no Movable parts, high reliability, long service life
High-precision measurements can be made from water and oil to pastes with higher viscosity, and are not affected by the electrical characteristics of the measured medium’s foaming and deposition
No material fatigue wear, insensitive to vibration and impact
Wide range of temperature compensation
Equipped with power supply reverse polarity protection and overload current limiting protection.
Working principle of liquid level transmitter
Measurement principle using static pressure method
When the liquid level transmitter is put into a certain depth of the liquid to be measured, the pressure on the liquid surface of the sensor is +
Formula in
Unit of the pressure on the liquid surface of the sensor
Unit of density of the measured liquid/
Unit of local gravity acceleration/
Unit of atmospheric pressure on the liquid surface
Depth unit of the sensor being put into the liquid
At the same time, the atmospheric pressure on the liquid surface is introduced into the back pressure chamber of the sensor through the air guide cable to offset the force of the sensor facing the liquid surface, so that the pressure measured by the sensor is br/> Obviously, By measuring the pressure, the liquid level depth can be obtained. The pressure signal sensed by the sensor is converted and amplified by the circuit, and is output as a standard signal after compensation.
Technical performance of liquid level transmitter
Applicable medium input type is suitable for media coexisting with stainless steel and polyvinyl chloride, and the flange type can measure non-corrosive media.
Measuring range
Accuracy
Working temperature ℃ + ℃ medium without crystallization
Storage temperature ℃ + ℃
Zero point temperature coefficient range/℃
Range temperature system Quantity range/℃
Long-term stability range/year
Power supply voltage standard
Output signal two-wire system
Please refer to the figure for load characteristics. When standard, load resistance
Allowable overload standard Times of the measuring range
Current limiting protection In case of overload, the power limit is nominally
Protection level
Explosion-proof level II
Transmitter relay box is cast aluminum, and the shell is epoxy Resin spraying
Transmitter probe,
Gas cable diameter core PVC cable
Weight does not include gas cable approx.