Omron E3Z-R81 2M Photoelectric Sensor
The Omron E3Z-R81 2M Photoelectric Sensor is a compact sensing device designed for stable object detection in industrial automation systems. This Omron Retro-reflective Type Sensor supports a sensing distance from 100 mm to 3 m with M.S.R. function for reliable detection performance in reflective applications. It features PNP output, a red LED light source, Light-ON/Dark-ON operation modes, and a durable 2 m pre-wired cable for flexible installation. Operating on a 12 to 24 VDC power supply, the sensor supports stable performance across continuous industrial processes. Commonly identified as Omron E3Z-R81 in automation environments, this model is manufactured by Omron automation and belongs to the photoelectric sensing range within the E3Z series sensors.
| Brand | Omron |
| Product | Photoelectric Sensors |
| Model Number | E3Z-R81 2M |
Omron E3Z-R81 2M Photoelectric Sensor – Technical Specifications
| Specification | Value |
|---|---|
| Sensing Method | Retro-reflective with M.S.R. function |
| Sensing Distance | 100 mm to 3 m |
| Light Source | Red LED (660 nm) |
| Power Supply Voltage | 12 to 24 VDC |
| Output Configuration | PNP |
| Connection Method | Pre Wired, Cable Length 2M |
| Current Consumption | 30 mA max. |
| Operation Mode | Light-ON/Dark-ON |
| Response Time | Operate or reset: 1 ms max |
| Sensitivity Adjustment | One-turn adjuster |
| Ambient Illumination | Incandescent lamp: 3,000 lx max. Sunlight: 10,000 lx max |
| Ambient Temperature Range | Operating: −25 to 55°C, Some connector models: −40°C to 55°C * (with no icing or condensation) Storage: −40 to 70°C (with no icing or condensation) |
| Ambient Humidity Range | Operating: 35% to 85%, Storage: 35% to 95% (with no condensation) |
| Insulation Resistance | 20 MΩ min. at 500 VDC |
| Dielectric Strength | 1,000 VAC, 50/60 Hz for 1 min |
| Vibration Resistance | Destruction: 10 to 55 Hz, 1.5 mm double amplitude for 2 hours each in X, Y, and Z directions |
| Shock Resistance | Destruction: 500 m/s2 3 times each in X, Y, and Z directions |
| Protection Circuits | Reversed power supply polarity protection, Output short-circuit protection, Mutual interference prevention, and Reversed output polarity protection |
| Degree Of Protection | IEC, IP67 |
| Material | PBT (polybutylene terephthalate) |
| Weight | Approx. 65 g |
The Omron E3Z-R81 2M is developed for automation systems that require compact retro-reflective sensing with stable response characteristics. Its PNP output structure supports reliable signal switching in conveyors, packaging systems, and object detection applications where consistent sensing performance is important. Engineers selecting Omron E3Z-R81 configurations typically consider this sensor for its compact design and dependable operation in industrial environments.
This Omron Retro-reflective Type Sensor maintains accurate detection performance in applications exposed to vibration, dust, and changing ambient light conditions. The built-in M.S.R. function improves sensing stability during reflective object detection while the red LED light source supports clear signal transmission. Its pre-wired 2 m cable simplifies installation across machine layouts and control systems.
Within the E3Z sensing platform, the Omron E3Z-R81 structure is designed for long-term industrial operation with stable electrical compatibility and reliable sensing behavior. Applications using this sensor depend on consistent object presence detection and predictable output response during continuous automation processes. This relationship between model, sensing method, and application makes the E3Z-R81 2M a practical solution for industrial sensing systems.
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