Slotted optical switch

Model: TP806.
The sensor is composed of an infrared diode and an NPN ST145 phototransistor. The change in the phototransistor occurs when an opaque object passes through the slit. The sensor is designed to be soldered directly to a board, or mounted using screws.

Specifications:
Input voltage: 3.3 V - 5 V
output: digital