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 C 09/2011
Page 1 of 7
Slotted Optical Switch
OPB820, OPB821Z, OPB821S
Z
OPTEK reserves the right to make changes at any time in order to improve design and to supply the best product possible.
Description:
Each OPB820 and OPB821Z device consists of an infrared emitting diode (LED, 890 nm center wavelength) and
a NPN silicon phototransistor mounted in a low-cost black plastic housing on opposite sides of an 0.080 (2.03
mm) wide slot. Each device in this series has a 0.040 (1.02 mm) wide aperture located in front of the infrared
diode. Phototransistor switching occurs when an opaque object passes through the slot.
Devices are offered with 0.275 (6.96 mm) lead spacing for PCBoard mounting (OPB820) or 24 (609 mm) 26
AWG wire leads (OPB821Z).
Custom electrical, wire and cabling and connectors are available. Contact your local representative or OPTEK for
more information.
Features:
" Non-contact switching
" Four standard aperture sizes for high resolution
" Low profile
" 0.080 (2.03 mm) wide, 0.250 (8.89 mm) deep slot
" Choice of PCBoard or wire mountings
Product Photo Here
RoHS
OPB821Z
Applications:
" Non-contact object sensing
" Assembly line automation
" Machine automation
" Equipment safety
" Machine safety
Ordering Information
Part
Number
LED Peak
Wavelength
Sensor
Slot Width /
Depth
Aperture
Emitter/Sensor
Lead Length /
Spacing
OPB820
890 nm Transistor
0.080" /
0.255
0.04"/ 0.04"
0.425" / 0.275"
OPB820S10
0.04"/ 0.01"
OPB820S5
0.04"/ 0.005"
OPB820S3
0.04"/ 0.003"
OPB821Z
0.040"/ 0.040"
24"/26 AWG
Wire
OPB821S10Z
0.040"/ 0.010"
OPB821S5Z
0.040"/ 0.005"
OPB821S3Z
0.040"/ 0.003"
OPB820