OPTEK Technology Inc. 1645 Wallace Drive, Carrollton, Texas 75006
Phone: (972) 323-2200 or (800) 341-4747    FAX: (972) 323-2396 sensors@optekinc.com www.optekinc.com
Issue B 9/2010
Page 1 of 4
OPTEK reserves the right to make changes at any time in order to improve design and to supply the best product possible.
Dual Channel Encoder
OPB822S, OPB822SD
OPB826S, OPB826SD
Features:
" Non-contact switching
" 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
Applications:
" Encoders
" Non-contact object sensing
" Assembly line automation
" Machine automation
" Equipment security
" Machine safety
RoHS
OPB826
OPB822
Description:
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 emitters.
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.
Part
Number
LED
Peak
Wavelength
Sensor
Slot
Width /
Depth
Aperture
Emitter/
Sensor
Lead
Length /
Spacing
OPB822S
Dual
935 nm
Dual
Transistor
0.09" /
0.30
None / 0.01"
0.35" /
0.30"
OPB822SD
0.01" / 0.01"
OPB826S
Dual
890 nm
Dual
Transistor
0.10" /
0.42
NA / 0.04"
OPB826SD
0.04" / 0.04"
0.20" /
0.74"