Omron E3Z-R81 0.5M Photoelectric Sensor
Omron E3Z-R81 0.5M is a retro-reflective photoelectric sensor with an M.S.R. function and a specified sensing range from 100 mm to 4 m. Its 670 nm red LED establishes the optical path toward the reflector, while the PNP output communicates the switching state to compatible machine-control circuitry. Selectable Light-ON and Dark-ON operation supports different output requirements. The sensor operates from 12 to 24 VDC and includes a 0.5 m pre-wired cable for short fixed wiring. Current consumption is specified at 30 mA maximum, while response time is 1 ms maximum. The PNP configuration distinguishes this version from corresponding NPN arrangements. Within the E3Z Series, the E3Z-R81 0.5M sits within the PNP retro-reflective sensor range across Omron Sensor Range.
| Brand | Omron |
| Product | Photoelectric Sensors |
| Model Number | E3Z-R81 0.5M |
Omron E3Z-R81 0.5M Photoelectric Sensor – Technical Specifications
| Specification | Value |
|---|---|
| Sensing Method | Retro-reflective with M.S.R. function |
| Shape | Square type |
| Sensing Distance | 100 mm to 4 m |
| Power Supply Voltage | 12 to 24 VDC |
| Output Configuration | PNP |
| Connection Method | Pre Wired Cable, 0.5m Length |
| Current Consumption | 30 mA max. |
| Light Source (Wavelength) | Red LED (670 nm) |
| Operation Mode | Light-ON/Dark-ON selectable |
| Response Time | 1 ms max. |
| Degree Of Protection | IEC: IP67 |
| Material | Polybutylene terephthalate (PBT) |
| Material Lens | Denatured Polyarylate |
| Features | Transparent detection |
| Weight | 65g |
The Omron E3Z-R81 0.5M Photoelectric Sensor uses retro-reflective sensing with an M.S.R. function across a specified range from 100 mm to 4 m. A 670 nm red LED provides the optical source directed toward the reflector, while the PNP output transfers the switching state to compatible PLC and machine-control circuitry. The sensor operates from 12 to 24 VDC and consumes up to 30 mA. Light-ON or Dark-ON operation can be selected according to the required output logic, while response time is specified at 1 ms maximum. A 0.5 m pre-wired cable provides short fixed wiring for installations where the connection point is located close to the sensor. PBT is listed for the case, while denatured polyarylate is specified for the optical material.
For an Omron PNP retro-reflective sensor requiring an M.S.R. function and short pre-wired connection, the relevant model is the E3Z-R81. Its 100 mm to 4 m sensing distance supports reflector placement across the stated operating span, while selectable Light-ON and Dark-ON operation allows the output sequence to match compatible control logic. The 12 to 24 VDC supply range and 30 mA maximum current consumption support integration with industrial control circuitry. Its specifications also suit requirements for an Omron 4 m PNP photoelectric sensor and Omron retro-reflective sensor with fixed wiring. For another E3Z-R81 configuration with a 2 m cable and a separately specified 100 mm to 3 m range, see E3Z-R81 2M.
