Opto Switch, Slotted - 

The EE-SX4070 is a Transmissive Photomicrosensor is a compact optical sensor that senses objects or object positions with an optical beam. Incorporates an IC chip with a built-in detector element and amplifier. Incorporates a detector element with a built-in temperature compensation circuit. Directly connects with C-MOS and TTL, high resolution with a 0.5mm wide sensing aperture. 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.