Omron E3ZM-R81 5M Photoelectric Sensor
Omron E3ZM-R81 5M is a PNP retro-reflective photoelectric sensor specified for sensing across a range from 100 mm to 4 m. Its red LED directs light toward the reflector, and changes in the returning optical path establish the output condition. The PNP output communicates the switching state to compatible industrial control circuitry, while Light-ON and Dark-ON operation supports different control requirements. Operating voltage is 10 to 30 VDC, with current consumption specified at 25 mA maximum. A 5 m pre-wired cable provides extended fixed wiring between the sensor and control equipment, while response time is 1 ms maximum. The E3ZM-R81 5M provides longer PNP wiring within the 4 m retro-reflective sensor range across Omron Sensing Products.
| Brand | Omron |
| Product | Photoelectric Sensors |
| Model Number | E3ZM-R81 5M |
Omron E3ZM-R81 5M Photoelectric Sensor - Technical Specifications
| Specification | Value |
|---|---|
| Sensing Method | Retro-reflective |
| Shape | Square type |
| Sensing Distance | 100 mm to 4 m |
| Power Supply Voltage | 10 to 30 VDC |
| Output Configuration | PNP |
| Connection Method | Pre-wired cable length 5m |
| Current Consumption | 25 mA max. |
| Light Source (Wavelength) | Red LED |
| Operation Mode | Light-ON/Dark-ON |
| Response Time | 1 ms max. |
| Degree Of Protection | IP67 |
| Material | SUS316L |
| Material Lens | Methacrylate resin |
| Weight | 90 g |
The Omron E3ZM-R81 5M Photoelectric Sensor uses retro-reflective sensing from 100 mm to 4 m and provides a PNP switching output. Its red LED sends light toward the reflector, with changes in the returning optical signal establishing the sensing state. The sensor operates from 10 to 30 VDC and consumes up to 25 mA. Light-ON and Dark-ON operation supports different control sequences, while response time is specified at 1 ms maximum. A 5 m pre-wired cable provides extended fixed connection from the sensing position to machine-side circuitry. The square body is specified in SUS316L, with methacrylate resin listed for the optical material. The longer cable changes wiring reach while retaining the same supplied 100 mm to 4 m optical span.
For an Omron PNP retro-reflective sensor requiring longer pre-wired connection without reducing the 4 m stated sensing distance, the relevant model is the E3ZM-R81. Its 10 to 30 VDC supply and 25 mA maximum current consumption define the listed electrical requirement, while the 1 ms response supports quick switching when the reflector path changes. The 5 m cable provides more freedom in routing to the control panel than shorter pre-wired versions. This listing uses a red LED and a straightforward 100 mm to 4 m range rather than the bracketed M.S.R. values supplied for the 2 m R81 model. For a related NPN version with the same stated 4 m range and 5 m cable, see E3ZM-R61 5M.
