A1MF Non-contact Photoelectric Water Level Sensor

- Dec 13, 2020-

  For example, electric steamers, coffee makers, water purifiers, humidifiers and other electrical appliances need to be added or cleaned in most of the water tanks, so integrated photoelectric liquid level sensors cannot be used, and separate liquid level sensors must be used. The functions of the two are the same, and they can also detect the liquid level, so what is the difference between a separate liquid level sensor and an integrated photoelectric liquid level sensor?

working principle:

Install the separate water level switch at the bottom of the water tank container. When the water level drops to a low level, the separate water level switch will give a signal to indicate the water shortage status, and the equipment will stop working after receiving the signal; when it is installed on the side and water is added to a certain position , the separate water level switch will also give a signal, so that the equipment stops filling water to prevent the water from overflowing.

The separated photoelectric liquid level sensor is composed of a light-emitting diode, a photosensitive receiver, and a lens in the same body. The transmitting and receiving tubes are all in the sensor, and the lens is separated from the sensor part. The lens is usually integrated with the container or installed in the container.


l, humidifier machine, water dispenser, automatic milk machine, coffee machine,

2. Steam microwave oven, water pump, bathtub, toilet, sanitary ware, medical equipment, etc.

Compared with float type liquid level sensor:

1. The float type liquid level sensor relies on the buoyancy of the liquid to push the float with a magnet to move up and down, so that the internal reed switch is opened and closed, so the float has a certain draft, and the float is easily stuck and cannot move. Low reliability. The separate photoelectric liquid level sensor judges whether there is water or anhydrous state according to the amount of light that is refracted back into the receiver after the internal light-emitting diode emits the light beam, so it is high reliability.

2. The separated liquid level sensor uses the principle of optical refraction to detect the liquid level, so the liquid level detection accuracy is high and can be controlled within ±0.5mm. The float type liquid level sensor mainly uses the buoyancy of water to measure the liquid level, and the detection accuracy of the liquid level is low. Generally, the detection accuracy of the float type liquid level sensor is ±3mm.

3. The separated liquid level sensor does not directly contact the liquid, can realize non-contact detection, is hygienic and easy to clean, and the water tank is movable.The liquid level of the float type liquid level sensor requires most of the area to contact the liquid, and the magnet in the float ball will adsorb impurities in the liquid and cause scale formation. It is difficult to clean due to its looseness and complexity, and the water tank cannot be moved.


A1MF Level Sensor (6)