What's the difference between water level controller and water level sensor?

- Feb 25, 2021-


Many people think that the liquid level sensor and the liquid level controller are the same thing.

In fact, they are different. 


The following is the difference between the liquid level sensor and the liquid level controller: 

1. Composition difference:

The liquid level sensor only senses whether there is water in the installation position, and is a component of the liquid level controller; 

The liquid level controller needs to use the signal sent by the sensor to control the start and stop of other equipment, and the two should be connected together. 

The sensor provides signals to the controller, and then controls the work of the equipment, which is a serial working relationship. 


2. Application difference:

The liquid level sensor does not necessarily display the liquid level, but outputs the height of the liquid level in the form of an electrical signal. 

The liquid level controller is a controller that opens the water discharge or water inlet valve according to the signal output of the liquid level sensor to keep the water level constant. 

The function of the liquid level sensor is to send out electrical signals. If you add a device that reads and displays the electrical signal, it is an electronic level gauge,

if you add a device that reads and processes the electrical signal, it is a level controller. 

Simply put, if you want to measure whether a certain liquid level is reached, you use a liquid level switch, 

and if you want to accurately measure the height of the liquid level, use a liquid level sensor. 

The liquid level switch is a switch control circuit, and the liquid level sensor is equivalent to a circuit element for voltage and current. 

The liquid level switch is a switch on the container. When the liquid level is reached, it sends out an action to control a switch signal.

The liquid level sensor can also play the role of a liquid level switch to measure liquid level, but it is more complicated than it. 

It can continuously display the state of the liquid level or not display the liquid level, but output the liquid level in the form of electrical signals The heights. 

However, liquid level switches and liquid level sensors can sometimes be used in common. 

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