Red Lion Controls ZBG12002 Rotary Pulse Generator, Standard Duty, Single Output, 1200 Pulse Per Revolution Overview The units contain an L.E.D. light source and a photo sensor that scans a shaftmounted, slotted disc. An internal pulse-shaping amplifier circuit delivers a rectangular pulse signal from the current sinking output in response to the passing slots as it rotates. They can be direc..