The electric displacer liquid level gauge is a liquid level measuring instrument designed according to Archimedes' law and the principle of magnetic coupling. It is used to measure the water level inside the pressure vessel and consists of four basic parts: buoy, spring, magnetic rifling and indicator.

The electric displacer level gauge system consists of three parts: detection, conversion and transmission. The inspection part consists of buoys and links. The conversion part consists of levers, torque tube components and sensors. The transmission part consists of CPU, A/D, D/A and LCD. Display composition.

The working principle of the electric float level gauge:

If the liquid is measured as having no liquid level, the buoyancy is not affected by the buoyancy, the connecting wire connected to the top of the buoy is in a tight state, and the torsion lever is affected by the gravity of the buoy, producing a fixed torque. At this time, the buoy water level gauge needs to output a current of 4 mA. That is, the buoy water level meter is zero.

After the measured liquid level rises, the liquid enters the measuring tank, the buoy peak water level rises, the volume of the discharged liquid continues to increase, and the volume of the internal buoy submerged in the medium also continues to increase. According to Archimedes' law, the buoyant force on an object is equal to the volume of liquid that the object displaces (i.e. the volume the object is submerged in water). A buoy rod is a small, heavy metal tube, so the weight of the liquid expelled by the buoy is less than the weight of the buoy itself, so the connector above the buoy is still tight. The torsion bar subtracts the weight of the liquid the buoy is expelling (the buoyancy of buoyancy) from the gravity of the buoy, producing a varying torsional force. At this time, the current output by the buoy water level gauge is greater than 4 mA.

When the water level of the tested liquid is high, all the buoys are submerged by the test liquid. At this time, the volume weight of the liquid discharged by the buoy is a fixed number, and the torsional force on the torsion bar is the weight of the buoy itself minus the liquid discharged from the buoy. the weight of. At this time, the torsion bar bears a fixed torsional force, and the current output by the buoy water system is full of 20 mA, that is, the buoy water system.