High Accuracy 1mm optical liquid level sensor by Shenzhen EPT Tech co., LTD
Integrated Single Point Water Liquid Level Sensor, the theory is infrared, it can totally replace traditional float level
switch, it controls the level though output high or low voltage.
When the detected level is in air, due to reflect of the prism,most of light will enter receiver LED, optical level sensor will output high voltage.
When the detected level is in water, due to refraction of the liquid, just less of light enter receiver LED, optical level sensor will output low voltage.
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