Photoelectric liquid level sensor is one of the core technologies of water level detection in swimming pool cleaning robot. This sensor senses liquid level changes by the difference in refraction of light in water and air. Its operating principle is based on the refraction and reflection of light, and the internal design is composed of optical electronic components, including infrared emission tubes and photosensitive receivers, all of which are sealed with resin to ensure stability and durability. This design makes there are no mechanical moving parts in the sensor, avoiding the maintenance needs caused by wear or mechanical failure, and truly realizing the goal of free commissioning, free inspection and free maintenance.
The core components of the photoelectric liquid level sensor include infrared transmitting tube and photosensitive receiver, and the key position of monitoring is a special prism structure. When the water level is in the normal range set by the sensor, the light emitted by the transmitting tube is refracted through the lens to the receiving tube, forming a stable light signal. When the water level is below the sensor position, the light will be refracted into the liquid, and the receiver will not receive or only receive weak light, which will trigger the alarm signal. This mechanism allows the pool cleaning robot to monitor the pool water level in real time to ensure that it is working at the right level to avoid equipment damage or poor cleaning due to low or high water levels.
