If youβre not fully sure about E3Z-T81-2M, taking a closer look at Omron Photoelectric Sensor, E3Z D61 2M and Omron Sensors often helps compare reliability, cost, and availability.
Omron E3Z-T81 2M Photoelectric Sensor
The Omron E3Z-T81 2M Photoelectric Sensor offers Through-beam, 15 m Sensing distance, PNP Output, Pre-wired 2 M cable, 12 to 24 VDC Power Supply Voltage. Manufactured by Omron under the Omron Photoelectric Sensors category, this model belongs to the Omron E3Z Series and includes an Emitter (E3Z-T81-L 2M) and Receiver (E3Z-T81-D 2M), it utilizing a Infrared LED (870 nm), Light-ON/Dark-ON selectable mode.

| Brand | Omron |
| Product Type | Photoelectric Sensor |
| Model Number | E3Z-T81 2M |
Omron E3Z-T81 2M Photoelectric Sensor β Technical Specifications
| Specification | Value |
|---|---|
| Sensing Method | Through-beam |
| Sensing Distance | 15 m |
| Emitter Number | E3Z-T81-L 2M |
| Receiver Number | E3Z-T81-D 2M |
| Standard Sensing Object | Opaque: 12-mm dia. min. |
| Light Source | Infrared LED (870 nm) |
| Power Supply Voltage | 12 to 24 VDC |
| Output configuration | PNP |
| Connection Method | Pre-wired 2 M cable |
| Current Consumption | 35 mA max. (Emitter: 15 mA max., Receiver: 20 mA max.) |
| Control Output | Load power supply voltage: 26.4 VDC max., Load current: 100 mA max. Residual voltage: Load current of less than 10 mA: 1 V max. Load current of 10 to 100 mA: 2 V max. |
| Operation Mode | Light-ON/Dark-ON selectable |
| Response Time | Operate or reset: 1 ms max. |
| Sensitivity Adjustment | One-turn adjuster |
| Indicators | Operation indicator (orange), Stability indicator (green), Through-beam Emitter has power indicator (orange) only. |
| Ambient Illumination | Incandescent lamp: 3,000 lx max. Sunlight: 10,000 lx max. |
| Ambient Temperature Range | Operating: β25 to 55Β°C, Some connector models: β40Β°C to 55Β°C, Storage: β40 to 70Β°C (with no icing or condensation) |
| Ambient Humidity Range | Operating: 35% to 85%, Storage: 35% to 95% (with no condensation) |
| Insulation Resistance | 20 MΞ© 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), Modified polyarylate |
| Weight | Approx. 30 g |
The Omron E3Z-T81 2M Photoelectric Sensor uses a through-beam sensing method powered by an Infrared LED (870 nm) to detect opaque objects as small as 12 mm across distances up to 15 meters. Its stable beam control and focused sensing performance make it ideal for fast-moving production lines, presence detection, and object tracking in automated packaging or material handling systems.
Built to operate on 12 to 24 VDC , the sensor is equipped with PNP open collector output and comes pre-wired with a 2-meter cable for easy setup. A 1-turn sensitivity adjuster allows quick calibration, while the selectable Light-ON/Dark-ON mode gives added flexibility for diverse automation environments. Visual indicatorsβorange for operation and green for stabilityβensure immediate feedback, and the fast 1 ms response time supports high-speed synchronization with controllers.
Engineered with a durable housing made from PBT and modified polyarylate resin, the E3Z-T81 2M meets IP67 protection standards, resisting dust, moisture, and environmental vibrations. It includes essential protection features like reverse polarity protection, output short-circuit protection, and reversed output polarity protection, ensuring operational safety and sensor longevity.




