Overview
The Omron E3Z-T81A-D photoelectric sensor is a through-beam receiver component designed for industrial detection applications. It features a 10m sensing distance with PNP open collector output and pre-wired connection. The “-D” designation indicates this is the receiver unit of a through-beam sensor set, requiring a matching E3Z-T81A-L emitter for complete operation. This compact, durable sensor delivers reliable performance in applications demanding precision object detection and consistent uptime.
Key Features
- Compact housing (31mm × 10.8mm × 20mm) with PBT material construction
- 10m maximum sensing distance for medium to long-range detection
- 1ms response time enables fast target detection and signal switching
- IP67 rating for dust and washdown resistance in harsh environments
- PNP open collector output for direct PLC and controller integration
- Supply voltage range 12–26.4V DC for flexible power system compatibility
Technical Specifications
| Part Number | E3Z-T81A-D |
| Sensor Type | Through-Beam Photoelectric Receiver |
| Sensing Distance | 10 m (maximum) |
| Output Type | PNP Open Collector |
| Supply Voltage | 12–26.4 V DC |
| Response Time | 1 ms |
| Housing Material | PBT Plastic |
| Dimensions | 31 mm (H) × 10.8 mm (W) × 20 mm (D) |
| Cable Length | 2 m (standard pre-wired) |
| IP Rating | IP67 |
| Operating Temperature | -25 to 55 °C |
| Light Source | Infrared LED (870 nm) |
| RoHS Compliant | Yes |
| Connector Type | Cable (4-pin) |
Typical Applications
The Omron E3Z-T81A-D excels in through-beam detection for:
- Conveyor system monitoring and object presence detection
- Packaging and material handling equipment
- Assembly line automation and part counting
- Industrial machinery safety interlocks
- Warehouse and logistics automation
- Harsh or wet environments requiring IP67 protection
Compatibility & Replacements
Compatible With
- Omron E3Z-T81A-L emitter (required for through-beam operation)
- Standard 12–24 V DC industrial power supplies
- Allen-Bradley, Siemens, Mitsubishi, and other PLC controllers with PNP input modules
- Industrial automation networks and discrete I/O systems
- Safety controllers and monitoring systems (verify electrical interface requirements)
Replaces / Drop-In Replacement For
- Legacy Omron E3Z-T81 10m receiver units (verify cable length and connector type)
- Other Omron E3Z-series through-beam receivers with equivalent specifications
- Verify compatibility with your specific system integrator before ordering
Works With
- Omron AutomationWorks and control platforms
- Standard PLC analog and discrete input modules
- Discrete 12–24 V DC control circuits
- Industrial Ethernet systems (when integrated with appropriate gateways)
- Omron E3Z sensor family peripherals and monitoring accessories
