Omron E3Z-LL66 Photoelectric Sensor
Omron E3Z-LL66 is a distance-settable photoelectric sensor using background suppression across an adjustable 20 to 300 mm sensing range. Its 655 nm red laser creates a defined optical point, while the BGS principle helps separate the intended target from surfaces positioned behind the selected sensing distance. The NPN open-collector output communicates the switching state to compatible industrial control equipment, while selectable Light-ON and Dark-ON operation supports different control logic. The sensor operates from 12 to 24 VDC and uses a 4-pin M8 connector for detachable wiring. Current consumption is specified at 30 mA maximum, response time at 1 ms maximum, and a five-turn endless adjuster supports setting across the available range. Within the E3Z Series, the E3Z-LL66 provides connector-based sensing within the laser background suppression range across the Omron Sensor Range.

| Brand | Omron |
| Product | Photoelectric Sensors |
| Model Number | E3Z-LL66 |
Omron E3Z-LL66 Photoelectric Sensor – Technical Specifications
| Specification | Value |
|---|---|
| Sensing Method | Distance-settable (BGS Models) |
| Sensing Distance | 20 to 300 mm |
| Light Source | Red LD (655 nm), Laser Class 1 |
| Power Supply Voltage | 12 to 24 VDC |
| Output Configuration | NPN |
| Connection Method | Connector (M8, 4 pins) |
| Current Consumption | 30 mA max. |
| Control Output | Load power supply voltage: 26.4 VDC max., Load current: 100 mA max., Open collector output |
| Operation Mode | Light-ON/Dark-ON |
| Response Time | Operate or reset: 1 ms max. |
| Sensitivity Adjustment | Five-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: −10 to 55°C, Storage: −25 to 70°C (with no icing or condensation) |
| Ambient Humidity Range | Operating: 35% to 85%, Storage: 35% to 95% (with no icing or 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, Mutual interference prevention, and Reversed output polarity protection |
| Degree Of Protection | IP67 (IEC 60529) |
| Material | PBT (polybutylene terephthalate), Modified polyarylate resin |
| Weight | Approx. 20 g |
The Omron E3Z-LL66 Photoelectric Sensor uses distance-settable sensing with background suppression across an adjustable 20 to 300 mm range. Its 655 nm red laser creates a defined optical point, while the BGS principle helps separate the intended target from surfaces positioned behind the selected sensing distance. The NPN open-collector output supports a load supply voltage up to 26.4 VDC and a load current up to 100 mA. Light-ON or Dark-ON operation can be selected according to the required machine logic. The sensor operates from 12 to 24 VDC and uses a 4-pin M8 connector. Current consumption is specified at 30 mA maximum, response time at 1 ms maximum, and a five-turn endless adjuster supports accurate distance setting.
For an Omron laser sensor requiring NPN output, background suppression, and an adjustable 20 to 300 mm sensing range, the applicable model is the E3Z-LL66. Ambient-light resistance reaches 3,000 lx under incandescent light and 10,000 lx under sunlight. Operating temperature extends from -10 to 55°C, while storage covers -25 to 70°C without icing or condensation. Reverse supply polarity, output short-circuit, mutual-interference, and reversed-output polarity protection are included. PBT and modified polyarylate resin are listed as materials. The M8 connection supports detachable machine wiring, while the adjustable sensing point helps separate a required target from the background. Its specification also fits searches for an Omron NPN BGS sensor and Omron M8 laser sensor. For the corresponding PNP output version using an M8 connector, see the E3Z-LL86.


