Omron E3T-FL21 2M Photoelectric Sensor
Omron E3T-FL21 2M is an ultrathin BGS reflective photoelectric sensor designed for object sensing from 1 to 30 mm. Its background suppression function helps restrict sensing to the required target area while reducing the influence of surfaces farther behind the object. A 650 nm red LED supplies the optical source, and the NPN open-collector output transfers the switching state to compatible control circuitry. Light-ON operation is specified, with operate or reset time of 1 ms max. The sensor operates from 12 to 24 VDC, consumes 20 mA, and includes a 2 m pre-wired cable. Within the E3T Series, the E3T-FL21 2M provides the 30 mm NPN BGS option. Related 30 mm BGS sensors are available across Omron Industrial Products.
| Brand | Omron |
| Product | Photoelectric Sensors |
| Model Number | E3T-FL21 2M |
Omron E3T-FL21 2M Photoelectric Sensor – Technical Specifications
| Specification | Value |
|---|---|
| Sensing Method | BGS- reflective |
| Sensing Distance | 1 to 30 mm (50 × 50 mm white paper) |
| Standard Sensing Object | 0.15-mm dia. non-glossy object (sensing distance 10 mm) |
| Light Source | Red LED (650 nm) |
| Power Supply Voltage | 12 to 24 VDC , ripple (p-p) 10% max. |
| Output Configuration | NPN |
| Connection Method | Pre-wired 2 M cable |
| Current Consumption | 20 mA max. |
| Control Output | Load power supply voltage: 26.4 VDC max. Load current: 50 mA max. (residual voltage: 2 V max. for load current of 10 to 50 mA, 1 V max. for load current of less than 10 mA) Open-collector output |
| Operation Mode | Light-ON |
| Response Time | Operate or reset: 1 ms max. |
| Indicators | Operation indicator (orange), Stability indicator (green) |
| Ambient Illumination | Incandescent lamp: 5,000 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 2,000 Hz, 1.5-mm double amplitude or 300 m/s2 for 0.5 hours each in X, Y, and Z directions |
| Shock Resistance | 1,000m/s2 3 times each in X, Y, and Z directions |
| Protection Circuits | Power supply and control output reverse polarity protection, Output short-circuit protection, Mutual interference prevention |
| Degree Of Protection | IEC 60529 IP67 |
| Material | PBT (polybutylene terephthalate), Denatured polyarylate |
| Weight | Approx. 20 g |
The Omron E3T-FL21 2M Photoelectric Sensor uses BGS reflective sensing across a 1 to 30 mm range with a 50 × 50 mm white-paper reference target. Background suppression helps reduce the influence of surfaces positioned beyond the intended sensing area. A 650 nm red LED supplies the optical source, and the sensor can sense a 0.15 mm diameter non-glossy target at a 10 mm distance under the stated condition. Its NPN open-collector output transfers the switching state to compatible control equipment, while Light-ON operation is specified. The sensor operates from 12 to 24 VDC, consumes 20 mA max., and responds within 1 ms max. A 2 m pre-wired cable supports direct electrical connection, with orange operation and green stability indicators providing visual status.
For an Omron 30 mm background suppression sensor requiring NPN output and Light-ON operation, the corresponding model is the E3T-FL21. Output load current is specified at 50 mA max., with load power-supply voltage up to 26.4 VDC. Operating temperature extends from -25 to 55°C and storage from -40 to 70°C without icing or condensation. Reverse-polarity protection, output short-circuit protection, and mutual-interference prevention are specified. The model also suits searches for an Omron NPN BGS sensor and Omron 650 nm photoelectric sensor. For the related PNP version using the same 1 to 30 mm BGS range and Light-ON operation, see E3T-FL23 2M.
