What's liquid level controller?

- Feb 20, 2021-


The liquid level controller is also called the water level switch, which is mainly used to control the liquid level, which is mainly divided into contact and non-contact types.

Its working principle is to control the high and low liquid level through mechanical or electronic methods, which can control solenoid valves, water pumps, etc., so as to achieve semi-automation or full automation.


It is worth noting that the float of the liquid level controller is susceptible to external debris to affect its stability, especially fibrous debris entangled and made mistakes.

It is not advisable to use more than one in the same small water tank, otherwise, they will be entangled.

The service life is relatively short, and most of them are directly connected to 220V. 

There are certain safety risks.

One day, there will be electricity leakage due to broken wires.

Therefore, the wire of the float switch is an integral part of the device. 

Once the wire is found to be damaged, the device should be replaced and the wire is not allowed to be repaired.

Liquid-level controllers using photoelectric sensors have no such problems.

Comparison of controllers (2)