Technical Overview
The Omron E3ZG-T81-S 2M is a through-beam photoelectric sensor set comprising an emitter and receiver, with a 15 m sensing distance and PNP receiver output. It uses an 870 nm infrared source, separate pre-wired 2 m cables and selectable Light-ON or Dark-ON operation. The system runs from 12–24 VDC, responds within 1 ms and is rated IEC IP65. Omron’s datasheet confirms the exact model specifications; current supply status is unconfirmed.
A 15 m through-beam PNP sensor set with 2 m cables, selectable output logic and IP65 protection.
Key Features
- Omron E3ZG-T81-S through-beam emitter and receiver set; PNP receiver output
- 15 m rated sensing distance
- 870 nm infrared LED source
- Selectable Light-ON/Dark-ON operation on the receiver output
- 12–24 VDC ±10% supply; 10% maximum ripple
- Receiver output: PNP open collector, 100 mA maximum load; 1 ms max response
- Separate pre-wired 2 m cables for emitter and receiver
- IEC IP65; PBT cases with modified-polyarylate receiver lens
- Current manufacturer supply status not confirmed
Pair emitter and receiver for through-beam detection across distances up to 15 m.
Technical Specification Matrix
| Parameter | Value |
| Sensor type | Through-beam photoelectric sensor set; emitter + receiver |
| Sensing distance | 15 m |
| Light source | Infrared LED, 870 nm |
| Output | PNP open collector at receiver; 100 mA max. load; Light-ON/Dark-ON selectable |
| Response time | 1 ms maximum operate or reset |
| Power supply | 12–24 VDC ±10%; 10% maximum peak-to-peak ripple |
| Current consumption | 35 mA max. for set (emitter 15 mA; receiver 20 mA) |
| Connection | Emitter and receiver each have pre-wired 2 m cable; emitter uses 2 conductors, receiver 3 |
| Operating temperature | −25 to 55 °C; no icing or condensation |
| Storage temperature | −40 to 70 °C; no icing or condensation |
| Relative humidity | Operating 35–85%; storage 35–95%, non-condensing |
| IP rating | IEC IP65 |
| Housing material | PBT cases; modified-polyarylate receiver lens |
| Physical Weight (kg) | Approx. 0.120 (packed set) |
| Dimensions L x W x H (cm) | 3.1 x 2.0 x 1.08 (each housing; cables excluded) |
Suggested applications
Engineering suggestions require suitability checks for your installation.
1. Long-range conveyor detection
A conveyor line may need to detect a package crossing a defined beam over a longer span.
Potential use
The matched emitter/receiver pair provides a 15 m through-beam path; confirm alignment, mounting, target opacity and cable routing for the installed line.
Through-beam
15 m
PNP
1 ms
2. Machine access or part passage monitoring
A machine may require a discrete signal when a component passes through a sensing plane.
Potential use
Selectable Light-ON/Dark-ON output and the receiver’s PNP output can be matched to the input logic after checking ambient conditions and the required detection behavior.
870 nm infrared
12–24 VDC
2 m leads
IP65