Omron Through Beam Photoelectric Sensor, Block Sensor

Omron EE-S series slotted optical switches are available in a variety of mounting styles and sizes. They consist of an infrared LED and a phototransistor housed in a moulded package. Types EE-SSX3... and EE-SX4... also include an integral schmitt trigger amplifier providing a clean transition with stable output.

Slotted Optical Switches, Omron