ifm OPL Series Optical Angle Sensors ifm OPL series optical angle sensors with a robust metal housing offer quick setup with no need to align a transmitter and receiver. These optical sensors are used in particular for part monitoring in feeder and handling systems. Further application examples are belt edge or double feed monitoring with the exact sensitivity setting via potentiometer being helpful. The fine light beam with its constant small diameter is also ideal for monitoring shaft imbalance. Features and Benefits Metal housing reduces distortion Quick setup: no need to align transmitter and receiver Easy sensitivity setting via potentiometer Light-on/dark-on mode via rotary switch Across the whole fork width: fine and precise light beam