Nowadays, people are paying more and more attention to the health and safety of drinking water, so many related smart electronic products are slowly derived. At the same time, many families also choose water purifiers.
The water purifier contains a water tank and needs to realize liquid level detection. That is, a liquid level sensor is needed to realize the function of liquid level detection. Different liquid level sensors can be selected according to the application. Sensors can be divided into two categories, one is contact type, and the other is non-contact type. The contact type includes photoelectric integrated type, float type, non-contact type includes capacitive type, photoelectric separation type sensor and so on.
The photoelectric liquid level sensor uses the infrared reflection principle. When the medium is liquid, because the refractive index of the liquid is similar to that of the sensor front end, almost all light will penetrate the sensor front end. Using this principle, a light transmitter and receiver are designed in the sensor for detection.
Capacitive liquid level sensor is non-contact detection, which does not need to be in contact with liquid, so it can detect the liquid level of various toxic substances, strong acids, strong alkalis and various liquids without opening holes. Dirt and sediment in the water tank container will not affect the test results.
In the future, people will pay more and more attention to the problem of healthy drinking water. Liquid level sensors are an indispensable and important part of water purifiers. The future market demand will also usher in substantial growth.