Dual channel encoder
Single or double apertures for high resolution
Choice of slot widths
Choice of side-by-side or over/under dual channels
Choice of electrical outputs OPB826 OPB822 Each OPB822 and OPB826 slotted switch consists of two infrared emitting diodes and two NPN silicon phototransistors
mounted on opposite sides of a 0.090” (2.29 mm) wide slot (OPB822) or a 0.100” (2.54 mm) wide slot (OPB826).
OPB822 uses an side-by-side mounting configuration, while OPB826 uses an over/under mounting configuration.
OPB822S has 0.01” by 0.04” (0.25 mm x 1.02 mm) apertures in front of both phototransistors while the OPB822SD has the
aperture in front of both phototransistors and both emitters. The OPB826S has 0.04” by 0.04” (1.02 mm x 1.02 mm)
apertures in front of both phototransistors while the OPB826SD has the aperture in front of both phototransistors and both
Dual channels enable direction of travel sensing, with the low-cost plastic housing reduces possible interference from
ambient light and provides protection from dust and dirt.
Phototransistor switching occurs when an opaque object passes through the device slot.
For information on encoder design, see Application Bulletin 203 at:
Custom electrical, wire and cabling and
connectors are available. Contact your local
representative or OPTEK for more information. Encoders
Non-contact object sensing
Assembly line automation
Machine safety RoHS Part …