SODIAL(R) New 10 Pcs TCRT5000L TCRT5000 Reflective Optical Sensor Infrared 950mm 5V 3A 100% Brand new and high quality. Compact construction, sense the presence of an object by using the reflective IR beam from the object. Consists of a phototransistor. Snap-in construction for PCB mounting. Plastic polycarbonate housing construction which prevents crosstalk.