AutomationDirect’s QM series photoelectric sensors are IP67-rated and available in three-wire NPN or PNP styles and with visible red and infrared versions. The mini-rectangular photo eye sensors are constructed with plastic housings and have either an attached two-meter output cable or an M8 quick-disconnect connector. The series includes diffuse, diffuse with background suppression, retroreflective, retroreflective for transparent objects, and through-beam styles. All retroreflective models include one rectangular reflector; through-beam models are sold as an emitter and receiver pair. All models have a selectable light-on/dark-on output setting; select models are fitted with an easy-to-use potentiometer for setting switchpoint distance.