TT Electronics OPB620 Slotted Optical Switch
The OPB610 and OPB620 slotted optical switches consist of an infrared emitting diode and an NPN silicon phototransistor with an enhanced low current roll-off to improve contrast ratio and immunity to background irradiance.
Slotted optical switches are also known as opto switches or optical switches (however not the optical component). Including a photoemitter and a photodetector mounted in a single package, these switches provide status indications when light beams are interrupted in various types of instruments, systems and equipment.
Housings are made of low cost Infrared opaque plastic to minimize ambient light radiation interference.