By using the coffee machine to make coffee, the efficiency will be improved extremely quickly.
But when using a coffee machine to make coffee, you may encounter these two situations:
the coffee machine working with water shortage or with water overflows.
Therefore, to avoid the safety hazards caused by the coffee machine working with water shortage,
need to install a photoelectric liquid level sensor to detect high and low water levels to avoid water shortage or water overflow.
The photoelectric liquid level sensor detects the liquid level based on the light reflection and refraction principle at the interface of two different media.
The light from the light-emitting diode is reflected into the lens on the top of the sensor.
When the liquid is immersed in the lens of the sensor, the light is refracted into the liquid, making the receiver only receive a small amount of light or not.
The photoelectric liquid level sensor determines whether it is water-based on this change and sends the high or low signal.
The device receives the signals to start an external alarm or control circuit.
Therefore, when the liquid level sensor cannot detect water, the warning light will be lit or alarmed.
This is the function of the photoelectric liquid level sensor to protect the coffee machine from water shortage.
Moreover, can set that the device starts to add water after receives a signal from the sensor.
Then the device to stop adding water after receives another signal when the water is added to a certain position, to prevent the water from overflowing.
Therefore, the photoelectric liquid level sensor to detect the water level of the coffee machine is one of the effective ways
to realize water shortage protection or automatic water addition.