The function of the photoelectric liquid level switch is to detect the liquid level. Compared with the float type liquid level switch and the capacitive liquid level switch, the photoelectric liquid level switch is less affected by external factors, so the reliability is higher and the service life is longer.
The main function of the photoelectric level switch is to detect the change of liquid level, which can realize the functions of water shortage protection, low liquid level reminder and high liquid level alarm.
Water shortage protection function
When the photoelectric liquid level switch detects that the water in the tank is not available, the liquid level switch gives a signal, the device stops working after receiving the signal to realize the water shortage protection, which prevents the machine from dry burning. For example, the water level control of coffee machine, water purifier and steam microwave adopts liquid level switch to realize water shortage protection function.
Low level reminder
When the liquid drops to the sensor position, the liquid level switch gives a signal prompt. After the device receives the signal, the control circuit realizes the alarm reminding function—lighting reminder, buzzer alarm and etc. Specific applications such as humidifiers, aromatherapy machines, etc.
High level detection
Automatic watering function: When it is detected that there is no water in the internal water tank, the liquid level switch gives a signal to drive the water pump to add water. In order to stop adding water, it is necessary to install another liquid level switch at a high position to achieve high liquid level detection. When the water level rises to a high level of the photoelectric liquid level switch position, the liquid level switch gives a signal and stops adding water to achieve overflow prevention.