The contact photoelectric liquid level sensor is a contact liquid level measurement and control device designed using optical principles. The photoelectric liquid level sensor has the characteristics of simple structure and high positioning accuracy. The sensor has no mechanical parts, does not require additional debugging, and has high sensitivity, low power consumption, corrosion resistance, high pressure resistance, high temperature resistance, and stable chemical properties. The probe is small in size and compact in structure. It can be installed in multiple directions, such as top, bottom, side, and oblique, to detect the overflow, drying and horizontal liquid level of the solution. It can be used as a reminder and alarm function. It uses built-in transmitting diodes and phototransistors, so it has a long service life. The live parts are completely isolated from the controlled liquid, and there is no safety hazard. The matching adapter board converts the PH2.54 interface to the PH2.0 interface, so that the liquid level sensor FS-IR02 can be better combined with for Arduino. Technical specifications Model: FS-IR02 Type: Photoelectric liquid level switch Power supply voltage: 5 VDC Output current: 12 (mA) Operating temperature: -25-105 (℃) Low level output: Less than 0.1V High level output: Greater than 4.6V Liquid level detection accuracy: ±0.5mm Measuring range: Unlimited Lifespan: 50,000 hours Scope of application: Electrical products for water level control and protection Adapter board size: 28x28 mm Probe line length: 50cm Weight: 26g Colour:Black Material:plastic Note: Photoelectric sensors are sometimes affected by ambient light. Please avoid direct sunlight to avoid misjudgment. Due to different batches, there may be differences in product a