5Pcs Infrared Photoelectric Switch Sensor Obstacle Avoidance for Smart Robot 10‑36VDC Item Type: Infrared Photoelectric Switch Sensor Material: ABS Induction Range: Approx. 10 ~ 30cm / 3.9 ~ 11.8in adjustable Product Voltage: 10-36V DC Maximum Current: 300mA PNP normally open Response Time: <2m/20ms Direction Angle: 3°, -10°, -20° Working Environment Temperature: -25 ~ +55℃ Protection Level: IP65 Standard Test Object: Sunlight less than 10000LX, incandescent lamp less than 3000LX Photoelectric Switch Working Principle: Photoelectric switch is also known as photoelectric sensor, sensor is divided into diffuse reflection type, feedback reflection type, beam type sensor, and PLC programmable controller, single chip microcomputer, non gate circuit electronic counter, solid state relay, small relay and other products supporting use. The transmitting type aims at the target continuously transmitting the beam receiver converts the received light energy into a current which is transmitted to the following detection circuit, which can filter out the effective signal and apply the signal