- OPL551-OC
- Tt Electronics [optek Technology]
- SENSOR PHOTOLOGIC SIDE LOOKING - OPL551-OC
- OPL551-OCA
- Tt Electronics [optek Technology]
- SENSOR PHOTOLOGIC SIDE LOOKING - OPL551-OCA
- OPL551-OCB
- Optek Technologies, Inc.
- LOGIC OUTPUT PHOTO DETECTOR
- OPL551-OCSLA
- Optek Technology, Inc.
- Photologic plastic sensor.
- OPL551-OCSLB
- Optek Technology, Inc.
- Photologic plastic sensor.