OPB822S [Optek]

The OPB822 and OPB826 series are dual channel encoders consisting of infrared emitting diodes and NPN silicon phototransistors mounted on opposite sides of a slot. OPB822 uses a side-by-side mounting configuration with a 0.090" (2.29 mm) wide slot, while OPB826 uses an over/under configuration with a 0.100" (2.54 mm) wide slot. They offer single or double apertures for high resolution, choice of slot widths, side-by-side or over/under dual channels, and various electrical outputs. The low-cost plastic housing reduces ambient light interference and provides protection from dust and dirt. Dual channels enable direction of travel sensing, making them suitable for non-contact switching applications.