Omron E3S-R2E4 Photoelectric Sensor
The Omron E3S-R2E4 Photoelectric Sensor delivers retro-reflective detection up to 2 m using an infrared LED (950 nm) for accurate and stable object sensing performance. Operating on a 12–24 VDC power supply, it is part of the Omron automation range under the Omron Photoelectric Sensors category and the Omron E3S Series. Featuring 40 mA current consumption, Light-ON/Dark-ON selectable mode, 1 ms response time, and IP67 protection, this model includes a durable pre-wired cable and supports a load current of 80 mA max. for dependable operation in industrial automation environments.
| Brand | Omron |
| Product | Photoelectric Sensors |
| Model Number | E3S-R2E4 |
Omron E3S-R2E4 Photoelectric Sensor – Technical Specifications
| Specification | Value |
|---|---|
| Sensing Method | Retro-reflective |
| Sensing Distance | 0.1 to 2 m |
| Standard Sensing Object | Opaque: 30- mm dia. min. |
| Light Source | Infrared LED (950 nm) |
| Power Supply Voltage | 12 to 24 VDC |
| Connection Method | Pre-wired cable |
| Current Consumption | 40 mA max. |
| Control Output | Output current: 1.5 to 4 mA, Load current: 80 mA max. (residual voltage: 2 V max.) |
| Operation Mode | Light-ON/Dark-ON (selectable) |
| Response Time | Operate or reset: 1 ms max. |
| Sensitivity Adjustment | With an indicator |
| Indicators | Light indicator (red), 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, 50/60 Hz for 1 min |
| Vibration Resistance | 10 to 55 Hz, 1.5-mm double amplitude for 2 hours each in X, Y, and Z directions |
| Shock Resistance | 500 m/s2 3 times each in X, Y, and Z directions |
| Degree Of Protection | IEC IP67 |
| Material | Zinc die-cast, Polycarbonate, Iron |
Built for industrial-grade performance, the Omron E3S-R2E4 offers a sensing distance of 0.1 to 2 meters using a retro-reflective method optimized for opaque objects ≥30 mm. Powered by a stable 12 to 24 VDC input, it consumes just 40 mA and supports Light-ON/Dark-ON selectable modes. The integrated infrared LED (950 nm) ensures accurate object recognition, while the 1 ms response time enables high-speed applications. Visual feedback is delivered through dual indicators—a red light indicator and a green stability indicator—to simplify alignment and status monitoring.
Designed to perform reliably in harsh environments, the E3S-R2E4 withstands vibration (10–55 Hz), shock (500 m/s²), and extreme temperatures from −25°C to 55°C during operation. It’s enclosed in a durable zinc die-cast and polycarbonate body and rated IP67, ensuring full resistance to dust and water exposure. Enhanced with reverse polarity protection and short-circuit safety, this sensor is trusted by automation engineers for its long-term durability and fast, stable performance.
