Omron E3Z-B81 2M Photoelectric Sensor
Omron E3Z-B81 2M is a retro-reflective photoelectric sensor without an MSR function for sensing from 500 mm to 2 m when used with the E39-R1S reflector. Its 660 nm red LED establishes the optical path between the sensor and reflector, while the PNP output transfers the switching state to compatible control circuitry. Light-ON or Dark-ON operation can be selected according to the required machine logic. The sensor operates from 12 to 24 VDC and includes a 2 m pre-wired cable. Response time is specified at 1 ms maximum, current consumption is 30 mA maximum, and a one-turn adjuster supports sensitivity setting. Within the E3Z Series, the E3Z-B81 2M provides the 2 m PNP configuration. Related PNP retro-reflective sensors can be explored across Omron Sensing Products.
| Brand | Omron |
| Product | Photoelectric Sensors |
| Model Number | E3Z-B81 2M |
Omron E3Z-B81 2M Photoelectric Sensor – Technical Specifications
| Specification | Value |
|---|---|
| Sensing Method | Retro-reflective without MSR function |
| Sensing Distance | When using the E39-R1S: 500 mm to 2 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 | Polybutylene terephthalate (PBT) |
| Material Lens | Denatured Polyarylate |
| Features | Transparent detection |
| Weight | Approx. 65 g |
The Omron E3Z-B81 2M Photoelectric Sensor uses retro-reflective sensing without an MSR function across a range from 500 mm to 2 m when used with the E39-R1S reflector. Its 660 nm red LED establishes the optical path, while the PNP output communicates the switching state to compatible control circuitry. Light-ON or Dark-ON operation can be selected according to the required machine logic. The sensor operates from 12 to 24 VDC and includes a 2 m pre-wired cable. Response time is specified at 1 ms maximum, current consumption is 30 mA maximum, and a one-turn adjuster supports sensitivity setting. Ambient-light resistance reaches 3,000 lx under incandescent light and 10,000 lx under sunlight.
For an Omron PNP retro-reflective sensor requiring a 2 m cable and a sensing range extending to 2 m, the applicable model is the E3Z-B81. Operating temperature extends from -25 to 55°C, while storage covers -40 to 70°C without icing or condensation. Reverse supply polarity, output short-circuit, mutual-interference, and reversed-output polarity protection are listed. PBT and denatured polyarylate are specified as construction materials. Its configuration also suits searches for an Omron 2 m PNP sensor and Omron transparent object photoelectric sensor. For the shorter-cable version listed with an 80 to 500 mm range, see the E3Z-B81 0.5M. Both versions use selectable Light-ON or Dark-ON operation.
