Omron E3S-AT61 2M Photoelectric Sensor
Omron E3S-AT61 2M is an NPN through-beam photoelectric sensor with a vertical design and built-in amplifier for object sensing across a distance of up to 7 m. A 660 nm red LED establishes the optical path between separate emitter and receiver units, allowing an object to change the switching state when it interrupts the beam. The sensor operates from 10 to 30 VDC and includes a 2 m pre-wired cable for electrical integration. Light-ON or Dark-ON operation can be selected, while a two-turn endless adjuster supports setup. Both emitter and receiver consume up to 20 mA, and response time is 0.5 ms. Within the E3S Series, the E3S-AT61 2M provides the vertical pre-wired NPN option. Explore vertical through-beam sensors across Omron Industrial Products.
| Brand | Omron |
| Product | Photoelectric Sensors |
| Model Number | E3S-AT61 2M |
Omron E3S-AT61 2M Photoelectric Sensor – Technical Specifications
| Specification | Value |
|---|---|
| Sensing Method | Through-beam Sensors |
| Sensing Distance | 7 m |
| Standard Sensing Object | Opaque: 10-mm dia. min. |
| Light Source | Red LED (660 nm) |
| Power Supply Voltage | 10 to 30 VDC, including ripple (p-p) 10% |
| Output Configuration | NPN |
| Connection Method | Pre-wired 2 M Cable |
| Current Consumption | Both Emitter and Receiver: 20 mA max. (plus approx. 15 mA with turbo function) |
| Control Output | Load power supply voltage: 30 VDC max., Load current: 100 mA max. (residual voltage: 1 V max.) |
| Operation Mode | Light-ON/Dark-ON selectable |
| Response Time | Operation or reset: 0.5 ms max. |
| Sensitivity Adjustment | Two-turn endless adjuster with an indicator |
| Ambient Illumination | Incandescent lamp: 5,000 lx max. Sunlight: 10,000 lx max. |
| Ambient Temperature Range | Operating: −25°C to 55°C (with no icing or condensation) Storage: −40°C to 70°C (with no icing or condensation) |
| Ambient Humidity Range | Operating: 35% to 85% (with no condensation) Storage: 35% to 95% (with no condensation) |
| Insulation Resistance | 20 MΩ min. at 500 VDC between current-carrying parts and case |
| Dielectric Strength | 1,000 VAC, 50/60 Hz for 1 min. between current-carrying parts and case |
| Vibration Resistance | 10 to 55 Hz, 1.5-mm double amplitude for 2 hours each in X, Y, and Z directions |
| Shock Resistance | Destruction: 500m/s2, 3 times each in X, Y, and Z directions |
| Protection Circuits | Power supply reverse polarity protection, Output short-circuit protection |
| Degree Of Protection | IEC IP67; NEMA: 4X (indoors only) |
| Material | PBT, Denatured polyallylate, Stainless steel (SUS304) |
| Weight | Approx. 70 g |
The Omron E3S-AT61 2M Photoelectric Sensor uses through-beam sensing with a vertical design and built-in amplifier across a maximum distance of 7 m. Its 660 nm red LED establishes the optical path between separate emitter and receiver units, while the NPN output changes state when an object interrupts the beam. The sensor operates from 10 to 30 VDC and includes a 2 m pre-wired cable. Both emitter and receiver consume up to 20 mA, with approximately 15 mA additional consumption when turbo mode is active. Load current is rated up to 100 mA with maximum load supply voltage of 30 VDC. Light-ON or Dark-ON operation can be selected, while a two-turn endless adjuster supports sensitivity setup. Operation or reset time is specified at 0.5 ms maximum.
For an Omron NPN through beam photoelectric sensor requiring a vertical format, 7 m sensing, and fixed cable wiring, the relevant model is the E3S-AT61. The stated target is an opaque object with a minimum diameter of 10 mm. Ambient-light resistance reaches 5,000 lx under incandescent light and 10,000 lx under sunlight. Operating temperature extends from -25 to 55°C, while storage ranges from -40 to 70°C without icing or condensation. Power-supply reverse polarity and output short-circuit protection are included. Its specification also matches searches for an Omron vertical NPN sensor and Omron 7 m through beam sensor. For a vertical E3S NPN model using an M12 connector instead of the 2 m cable, see E3S-AT66.
