Common water level sensors include photoelectric type, floating ball type, capacitive type, and ultrasonic type, etc. The working principle and application environment of each kind of water level sensor are different, so how to choose the appropriate water level sensor?
First of all, according to their own application environment selection, such as industrial level detection, usually industrial water level detection, can use ultrasonic sensor, ultrasonic water level sensor advantage is that it can be real-time detection, and liquid level detection is accurate, feedback signal is fast. Photoelectric type can also be used in industrial-grade liquid detection.
If it is home appliances, then you can exclude the ultrasonic type, you can use photoelectric type or capacitive type.
The photoelectric water level sensor is the light emitted by the internal transmitting tube refracting back to the receiver, and the receiver is receiving (or not receiving) light to determine whether the sensor is in water or without water. Photoelectric water level sensor has high repetition accuracy, high reliability and long life.
The capacitive water level sensor can only be applied to the non-metal water tank, its working principle is to induce the difference in the water and anhydrous state, so as to judge the position of the sensor is in the aqueous or anhydrous state. The metal material will interfere with the capacitive detection, which may lead to misjudgment, so the stability of the capacitive water level sensor will be affected by the material of the detected container.
Understand the characteristics and application environment of the water level sensor, you can choose * * suitable water level sensor for their own application.
