Omron E3S-R2E4 Photoelectric Sensor
Omron E3S-R2E4 is a retro-reflective photoelectric sensor designed for object sensing across a range of 0.1 to 2 m. Its 950 nm infrared LED establishes the optical path toward the reflector, while changes in returned light determine the switching state. The sensor operates from 12 to 24 VDC and uses a pre-wired cable for machine connection. Light-ON or Dark-ON operation can be selected according to the required control logic. Current consumption is specified at 40 mA maximum, load current at up to 80 mA, and response time at 1 ms. Within the E3S Series, the E3S-R2E4 provides the 2 m reflector-based configuration. Explore infrared retro-reflective sensors across Omron Automation Sensors.
| 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 |
The Omron E3S-R2E4 Photoelectric Sensor uses retro-reflective sensing across a working range of 0.1 to 2 m. Its 950 nm infrared LED establishes the optical path toward the reflector, while an object changes the switching state by altering the returned light. The sensor operates from 12 to 24 VDC and uses a pre-wired cable for electrical integration. Current consumption is specified at 40 mA maximum, while output current is listed from 1.5 to 4 mA and load current reaches 80 mA maximum. Light-ON or Dark-ON operation can be selected according to the required machine logic. Operate or reset time is specified at 1 ms maximum. Red light and green stability indicators provide visual information during setup and operation.
For an Omron retro reflective photoelectric sensor requiring a 0.1 to 2 m range and infrared optical source, the corresponding model is the E3S-R2E4. The stated sensing target is an opaque object with a minimum diameter of 30 mm. Ambient-light resistance reaches 3,000 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. Zinc die-cast, polycarbonate, and iron are among the listed materials. Its configuration also fits searches for an Omron 2 m retro reflective sensor and Omron 950 nm photoelectric sensor. For another E3S model with the same stated 0.1 to 2 m sensing range, see E3S-R2E41.
