Omron E3Z-T81 0.5M Photoelectric Sensor
Omron E3Z-T81 0.5M is a through-beam photoelectric sensor designed for object sensing across a specified distance of 15 m. Its 870 nm infrared LED establishes the optical path between the transmitting and receiving sides, allowing the sensing state to change when a target interrupts the beam. The PNP output communicates the switching state to compatible PLC and machine-control circuitry, while selectable Light-ON and Dark-ON operation supports different control requirements. The sensor operates from 12 to 24 VDC and includes a 0.5 m pre-wired cable for short fixed wiring. Response time is specified at 1 ms maximum. The supplied data does not state separate emitter and receiver model numbers. The E3Z-T81 0.5M sits within the 15 m PNP through-beam sensor range across Omron Automation Products.
| Brand | Omron |
| Product | Photoelectric Sensors |
| Model Number | E3Z-T81 0.5M |
Omron E3Z-T81 0.5M Photoelectric Sensor – Technical Specifications
| Specification | Value |
|---|---|
| Sensing Method | Through-beam |
| Shape | Square |
| Sensing Distance | 15 m |
| Power Supply Voltage | 12 to 24 VDC |
| Output Configuration | PNP |
| Connection Method | Pre Wired Cable, 0.5m Length |
| Current Consumption | 26.4 VDC max |
| Light Source (Wavelength) | Infrared LED (870 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-T81 0.5M Photoelectric Sensor uses through-beam sensing across a specified distance of 15 m. An 870 nm infrared LED establishes the optical path between the transmitting and receiving sides, allowing the switching state to change when a target interrupts the beam. The PNP output communicates the resulting state to compatible PLC and machine-control circuitry. The sensor operates from 12 to 24 VDC and supports selectable Light-ON and Dark-ON operation according to the required control logic. Response time is specified at 1 ms maximum, while a 0.5 m pre-wired cable provides short fixed electrical connection. PBT is listed for the case and denatured polyarylate for the optical material. The supplied information does not state separate emitter and receiver model numbers for this listing, so none are added.
For an Omron through-beam photoelectric sensor requiring PNP output, 15 m sensing, and a short pre-wired connection, the relevant model is the E3Z-T81. Through-beam sensing establishes a defined optical path between transmitting and receiving elements, while the 12 to 24 VDC supply supports connection with compatible industrial control inputs. Selectable switching logic allows the output behavior to match the machine sequence, and the 1 ms response supports rapid state changes when the beam is interrupted. The 0.5 m cable is suited to layouts where the electrical connection is positioned close to the sensing unit. For the same E3Z-T81 configuration with longer pre-wired cables, see E3Z-T81 2M.
