Overview
The Omron E3Z-T81A-D photoelectric sensor is the receiver half of a through-beam detection pair, engineered for long-distance sensing applications in manufacturing and material handling. Part of the E3Z series, this compact plastic housing photoelectric sensor measures just 31mm × 10.8mm × 20mm and is designed to pair with a compatible emitter (E3Z-T81A-L) to create a complete through-beam system. The high-power LED allows optimum detection over long distances up to 15 meters or in dirty or dusty environments. The series provides high noise immunity against interference from inverters and other inductive loads.
Key Features
- Long Sensing Distance: 15 m maximum sensing distance enables detection across wide conveyor gaps and assembly lines
- Through-Beam Detection: Emitter/receiver pair configuration for reliable object detection in the beam path
- Built-in Amplifier: Integrated electronics eliminate the need for external amplifier modules
- PNP Output: PNP output type compatible with standard industrial PLC and control systems
- IP67 Rating: Rated IP67 and tested to withstand 1200 psi washdown applications
- Pre-Wired Cable: Shipped with 2-meter pre-wired cable for immediate installation
- Infrared LED Technology: Infrared LED (870 nm) light source for excellent performance in bright ambient light
- Compact Plastic Housing: Space-saving design suitable for tight mounting applications
Technical Specifications
Typical Applications
- Conveyor belt object detection and position sensing
- Assembly line end-of-line verification
- Parts counting and sorting systems
- High-speed packaging and bottling lines
- Document and mail sorting equipment
- Dirty or dusty industrial environments requiring IP67 washdown protection
- Long-distance detection requirements exceeding 10 meters
Compatibility & Replacements
Compatible With
- Allen-Bradley PLC and CompactLogix controllers with 24 VDC inputs
- Siemens S7-1200 and S7-1500 series via standard digital input modules
- Mitsubishi FX3U and FX5U controllers
- Omron CP/CJ/NX series PLCs
- Any controller with 24 VDC digital input capability
- EtherCAT and PROFINET fieldbus gateways for network integration
- Standard industrial 24 VDC power supplies
Replaces / Drop-In Replacement For
- E3Z-T81-D 2M — Earlier version without enhanced specs; verify specific sensitivity requirements
- Verify compatibility with your system integrator before ordering for critical applications
Works With
- Omron E3Z-T81A-L emitter (creates complete through-beam pair)
- Any 24 VDC industrial control system with standard digital input modules
- 24 VDC power supplies with minimum 10.8 V, maximum 26.4 V tolerance
- PLC programming software (Studio 5000, TIA Portal, GX Works, Sysmac Studio)
- Hardwired relay and contactor circuits
