The EESX1081 is a Transmissive Photomicrosensor with PCB mounting. Photomicrosensor is a compact optical sensor that senses objects or object positions with an optical beam. General-purpose model with a 5mm wide slot. High resolution with a 0.5mm-wide aperture, phototransistor sensor output. The transmissive photomicrosensor incorporates an emitter and a transmissive that face each other, when an object is located in the sensing position between the emitter and the detector, the object intercepts the optical beam of the emitter, thus reducing the amount of optical energy reaching the detector.