Optek Technology's OPB732 Series Infrared Switch
The OPB732 Series long-distance infrared reflective switch's non-contact design features an emitter and sensor protected from contaminants by a clear window. The OPB732 Series switch has a reflective distance of more than 1 in., depending on circuitry. The reflective switch configuration includes an infrared LED and phototransistor and uses an opaque housing to reduce the sensor's ambient light sensitivity. Operating temperature range for the long distance reflective switch is -40 °C to +85 °C.