| Horizontal Symbol | Vertical Symbol | Description |
 HPE1B14 |
 VPE1B14 |
Emitter - AC Driven |
 HPE1B15 |
 VPE1B15 |
Emitter - DC Driven |
 HPE13B16SC |
 VPE13B16SC |
Emitter - Receiver with Form C |
 HPE1B20 |
 VPE1B20 |
Emitter - DC Driven |
 HPE11PE4 |
 VPE11PE4 |
Normally Open 4 wire |
 HPE11PE4R |
 VPE11PE4R |
Normally Open 4 wire 180 |
 HPE12PE4 |
 VPE12PE4 |
Normally Closed 4 wire |
 HPE12PE4R |
 VPE12PE4R |
Normally Closed 4 wire 180 |
 HPE11PE4C |
 VPE11PE4C |
Normally Open 4 wire with connector |
 HPE11PE4RC |
 VPE11PE4RC |
Normally Open 4 wire 180 with connector |
 HPE12PE4C |
 VPE12PE4C |
Normally Closed 4 wire with connector |
 HPE12PE4RC |
 VPE12PE4RC |
Normally Closed 4 wire 180 with connector |