Principle application of three level sensors

1. Float type liquid level transmitter Float type liquid level transmitter is to change the magnetic float to buoy, and the liquid level sensor is designed according to the Archimedes buoyancy principle. Float type liquid level transmitter uses tiny metal film strain sensing technology to measure liquid level, boundary level or density, and it can perform routine setting operation through on-site keystrokes during work.

2. Float type liquid level transmitter Float type liquid level transmitter consists of magnetic float ball, measuring tube, signal unit, electronic unit, junction box and mounting parts. Generally, the proportion of magnetic float ball is less than 0.5. Above the liquid level and up and down along the measuring tube, the measuring tube is equipped with a measuring element, which can convert the measured liquid level signal into a resistance signal proportional to the change of the liquid level under the action of external magnetic field, and converts the electronic unit into 4-20 mA. Or other standard signal output.

The liquid level sensor is a module circuit, which has the advantages of acid resistance, moisture resistance, shock resistance, corrosion resistance, etc. The circuit contains a constant current feedback circuit and an internal protection circuit, so that the maximum output current does not exceed 28 mA, and thus it can reliably protect the power supply and make it secondary The meter is not damaged.

3, hydrostatic level transmitter The transmitter uses the principle of measurement of hydrostatic pressure, it is generally selected silicon pressure sensor to convert the measured pressure into electrical signals, and then amplified by the amplifier circuit and compensation circuit compensation Finally, the current output is 4 to 20mA or 0 to 10mA.