The OPB815WZ is a deep gap Slotted Switch with phototransistor and 26AWG stranded wire. This panel/chassis mounting switch consists of an infrared light emitting diode (LED) and an NPN silicon phototransistor mounted in a plastic housing. The device is designed to switch electrical states when an opaque object is passed through the slot. Suitable for non-contact object sensing, assembly line and machine automation, machine safety and equipment security.