FS-IR02 series Water Liquid Single Point Level Sensor, the theory is infrared, it can totally replace traditional float level switch, it controls the level though outputing 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.
Installation from any directions
1. OEM Manufacturing welcome: Product, Package... 2. Sample order 3. We will reply you for your inquiry in 24 hours. 4. after sending, we will track the products for you once every two days, until you get the products. When you got the goods, test them, and give me a feedback.If you have any questions about the problem, contact with us, we will offer the solve way for you.