Omron E3Z-LS81-UL 2M Photoelectric Sensor
Omron E3Z-LS81-UL 2M is a distance-settable photoelectric sensor using background suppression across a specified 20 to 200 mm range. Its 670 nm red LED provides the optical source, while the PNP output communicates the switching state to compatible machine-control circuitry. Selectable Light-ON and Dark-ON operation supports different control requirements. The sensor operates from 12 to 24 VDC and includes a 2 m pre-wired cable for electrical integration. Current consumption is specified at 30 mA maximum, while response time is 1 ms maximum. A 5-turn endless adjuster supports sensing-point adjustment during setup. Within the E3Z Series, the E3Z-LS81-UL 2M supports fixed wiring within the 200 mm PNP BGS sensor range across Omron Automation Sensor Products.
| Brand | Omron |
| Product | Photoelectric Sensors |
| Model Number | E3Z-LS81-UL 2M |
Omron E3Z-LS81-UL 2M Photoelectric Sensor – Technical Specifications
| Specification | Value |
|---|---|
| Sensing Method | Distance-settable |
| Sensing Distance | 20 to 200 mm (BGS setting) |
| Light Source | Red LED (670 nm) |
| Power Supply Voltage | 12 to 24 VDC, Class 2 |
| Output Configuration | PNP |
| Connection Method | Pre-wired 2 M cable |
| Current Consumption | 30 mA max. |
| Control Output | Load power supply voltage: 26.4 VDC max., Load current: 100 mA max. (residual voltage 1 V max.), Open collector output (NPN or PNP depending on model) |
| Operation Mode | Light-ON/Dark-ON selectable |
| Response Time | Operate or reset: 1 ms max. |
| Sensitivity Adjustment | 5-turn endless adjuster |
| Indicators | Operation indicator (orange), Stability indicator (green) |
| Ambient Illumination | Incandescent lamp: 3,000 lx max.; Sunlight: 10,000 lx max. |
| Ambient Temperature Range | Operating: −25 to 55°C, 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 at 50/60 Hz for 1 minute |
| 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 for 3 times each in X, Y, and Z directions |
| Protection Circuits | Reversed power supply polarity protection, Output short-circuit protection, Mutual interference prevention |
| Degree Of Protection | IP67 (IEC 60529) |
| Weight | Approx. 65 g |
The Omron E3Z-LS81-UL 2M Photoelectric Sensor provides distance-settable background-suppression sensing across a specified 20 to 200 mm range. A 670 nm red LED provides the optical source, while the PNP output communicates the switching state to compatible industrial control inputs. The sensor operates from 12 to 24 VDC and consumes up to 30 mA. Load supply voltage is specified up to 26.4 VDC, with load current up to 100 mA and residual voltage of 1 V maximum. Light-ON or Dark-ON operation can be selected, while operate or reset time is specified at 1 ms maximum. A 5-turn endless adjuster supports sensing-point setup, and a 2 m pre-wired cable provides fixed electrical connection.
For an Omron PNP background suppression sensor requiring a 200 mm maximum range and pre-wired connection, the relevant model is the E3Z-LS81-UL. Operating temperature is specified from -25 to 55°C, while storage extends from -40 to 70°C. Reversed power-supply polarity protection, output short-circuit protection, and mutual-interference prevention are included. Orange operation and green stability indicators provide visual information during setup. Ambient-light resistance reaches 3,000 lx for incandescent illumination and 10,000 lx for sunlight. Its specification also suits requirements for an Omron PNP distance sensor and Omron 200 mm BGS photoelectric sensor. For a related non-UL listing with a 2 m pre-wired cable, see E3Z-LS81 2M.
