Omron E3Z-T81K 2M Photoelectric Sensor
Omron E3Z-T81K 2M is a through-beam photoelectric sensor designed for object sensing across a specified distance of 15 m. The sensing arrangement uses the E3Z-T81K-L emitter and E3Z-T81K-D receiver, with an 870 nm infrared LED establishing the optical path between them. 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 2 m pre-wired cables for electrical connection. Total current consumption is specified at 35 mA maximum, while response time is 1 ms maximum. Within the E3Z Series, the E3Z-T81K 2M sits within the 15 m infrared through-beam sensor range across Omron Sensor Range.
| Brand | Omron |
| Product | Photoelectric Sensors |
| Model Number | E3Z-T81K 2M |
Omron E3Z-T81K 2M Photoelectric Sensor – Technical Specifications
| Specification | Value |
|---|---|
| Sensing Method | Through-beam |
| Sensing Distance | 15 m |
| Emitter Number | E3Z-T81K-L 2M |
| Receiver Number | E3Z-T81K-D 2M |
| Light Source | Infrared LED (870 nm) |
| Power Supply Voltage | 12 to 24 VDC |
| Output Configuration | PNP |
| Connection Method | Pre Wired, Cable Length 2M |
| Current Consumption | 35 mA max. (Emitter: 15 mA max., Receiver: 20 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, and Reversed output polarity protection |
| Degree Of Protection | IEC, IP67 |
| Material | PBT (polybutylene terephthalate) |
| Weight | Approx. 120 g |
The Omron E3Z-T81K 2M Photoelectric Sensor uses through-beam sensing across a specified distance of 15 m. The sensing arrangement includes the E3Z-T81K-L emitter and E3Z-T81K-D receiver, with an 870 nm infrared LED establishing the optical path between them. The PNP output communicates the switching state to compatible industrial control circuitry. The sensor operates from 12 to 24 VDC and consumes 35 mA maximum in total, with 15 mA maximum specified for the emitter and 20 mA maximum for the receiver. Light-ON or Dark-ON operation can be selected according to the required control sequence, while operate or reset time is 1 ms maximum. A one-turn adjuster supports setup, and 2 m pre-wired cables provide fixed electrical connection. Ambient-light limits are specified for incandescent illumination and sunlight.
For an Omron infrared through-beam sensor requiring PNP output, 15 m sensing, and fixed wiring, the relevant model is the E3Z-T81K. Operating temperature is stated from -25 to 55°C under the supplied conditions, while storage extends from -40 to 70°C. Operating humidity covers 35% to 85%, and insulation resistance is specified at 20 MΩ minimum at 500 VDC. Reversed power-supply polarity protection, output short-circuit protection, and reversed output-polarity protection are listed. PBT is specified as the housing material. The separate emitter and receiver provide a defined optical path across the stated range. For a related E3Z-T81K version using a pre-wired M8 connector, see E3Z-T81K-M3J 0.3M.
