A photoelectric sensor is a device used to determine the distance, absence, or presence of an object by using a light transmitter, often infrared, and a photoelectric receiver . Features: Sensing type: Through-beam type Sensing distance : 3m Sensing target: Opaque material of min. 8mm Light source: Infrared LED(940nm) Response time: Max. 3ms Power supply: 12-24VDC ±10%(ripple P-P: max. 10%) Operation mode: Dark ON Control output: NPN open collector Specifications: Certification: CCC Origin: CN(Origin) Features: photoelectric Switch Type: Photoelectric Switch Item Type: Switches Model Number: BM3M-TDT1 Package Includes: 1 x  Autonics BM3M-TDT1 Photoelectric Sensor