Omron Photoelectric E3FA/E3FB/E3RA/E3RB Sensor Programmable Logic Controller
Omron’s E3FA, E3FB, E3RA, and E3RB series are highly reliable photoelectric sensors designed for general-purpose object detection in industrial environments. These sensors combine compact size, easy installation, and excellent sensing performance, making them suitable for a wide range of automation and machine integration tasks.
Categories:
Omron Photoelectric Sensor- Multiple Sensing Modes:
- Through-beam for long-range detection (up to 20 m)
- Retro-reflective for transparent object detection
- Diffuse-reflective for short-range object sensing
- BGS (background suppression) for high-accuracy detection
- Rugged Design:
- E3FA / E3RA: Cylindrical M18 housing
- E3FB / E3RB: Rectangular compact housing
- IP67 Protection: Waterproof and dust-resistant
- DC and AC Models:
- E3FA / E3FB: DC 10–30V (PNP/NPN, NO/NC)
- E3RA / E3RB: AC/DC Universal voltage (24–240V)
- LED Indicators: For power and output status
- Easy Setup: Pre-wired or M12 connector versions available
| Specification | Description | |||||
|---|---|---|---|---|---|---|
| Sensing method | Through-beam | Retro-reflectivewith MSR function | Coaxial Retro-reflectivewith MSR function | |||
| Model | NPNoutput | Pre-wired | E3F[]-TN11 2M | E3FA-TN12 2M | E3F[]-RN11 2M | E3F[]-RN12 2M |
| M12 Connector | E3F[]-TN21 | E3FA-TN22 | E3F[]-RN21 | E3F[]-RN22 | ||
| PNPoutput | Pre-wired | E3F[]-TP11 2M | E3FA-TP12 2M | E3F[]-RP11 2M | E3F[]-RP12 2M | |
| M12 Connector | E3F[]-TP21 | E3FA-TP22 | E3F[]-RP21 | E3F[]-RP22 | ||
| Sensing distance | 20 m | 15 m | 0.1 to 4 m(with E39-R1S) | 0 to 500 mm(with E39-R1S) | ||
| Spot diameter (reference value) | — | |||||
| Standard sensing object | Opaque: 7 mm dia.min. | Opaque: 75 mm dia.min. | ||||
| Differential travel | — | |||||
| Directional angle | 2° min. | |||||
| Light source (wavelength) | Red LED (624 nm) | Infrared LED (850 nm) | Red LED (624 nm) | |||
| Power supply voltage | 10 to 30 VDC (include voltage ripple of 10%(p-p) max.) | |||||
| Current consumption | 40 mA max.(Emitter 25 mA max. Receiver 15 mA max.) | 25 mA max. | ||||
| Control output | NPN/PNP (open collector)Load current: 100 mA max. (Residual voltage: 3 V max.), Load power supply voltage:30 VDC max. | |||||
| Operation mode | Light-ON/Dark-ON selectable by wiring | |||||
| Indicator | Operation indicator (orange)Stability indicator (green)Power indicator (green): only Emitter of Through-beam | |||||
| Protection circuits | Power supply reverse polarity protection, Output short-circuit protection, and Output reverse polarity protection | |||||
| Response time | 0.5 ms | |||||
| Sensitivity adjustment | One-turn adjuster | |||||
| Ambient illumination (Receiver side) | Incandescent lamp: 3,000 lx max./Sunlight: 10,000 lx max. | |||||
| Ambient temperature range | Pre-wired ModelsOperating: -25 to 55°C/Storage: -40 to 70°C (with no icing or condensation)M12 Connector ModelsOperating: -40 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 at 50/60 Hz for 1 min. between current-carrying parts and case | |||||
| 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 | |||||
| Degree of protection | IEC: IP67, DIN 40050-9: IP69K * | |||||
| Weight (packed state / only sensor) | Pre-wired cable (2M) | E3FA: Approx. 110 g/Approx. 50 g,E3FB: Approx. 175 g/Approx. 65 g | E3FA: Approx. 60 g/Approx. 50 g,E3FB: Approx. 95 g/Approx. 65 g | |||
| Connector | E3FA: Approx. 30 g/Approx. 10 g,E3FB: Approx. 85 g/Approx. 20 g | E3FA: Approx. 20 g/Approx. 10 g,E3FB: Approx. 50 g/Approx. 20 g | ||||
| Material | Case | E3FA: ABS, E3FB: Nickel-brass | ||||
| Lens and Display | PMMA | |||||
| Adjuster | POM | |||||
| Nut | E3FA: POM, E3FB: Nickel-brass | |||||
| Accessories | Instruction sheetM18 nuts (4 pcs) | Instruction sheetM18 nuts (2 pcs) | ||||
| Function | Specification | ||||||||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Sensing method | Diffuse-reflective | ||||||||||||||||
| Model | NPNoutput | Pre-wired | E3F[]-DN11 2M | E3F[]-DN12 2M | E3F[]-DN13 2M | E3FA-DN14 2M | E3FA-DN15 2M | E3FA-DN16 2M | |||||||||
| M12 Connector | E3F[]-DN21 | E3F[]-DN22 | E3F[]-DN23 | E3FA-DN24 | E3FA-DN25 | E3FA-DN26 | |||||||||||
| PNPoutput | Pre-wired | E3F[]-DP11 2M | E3F[]-DP12 2M | E3F[]-DP13 2M | E3FA-DP14 2M | E3FA-DP15 2M | E3FA-DP16 2M | ||||||||||
| M12 Connector | E3F[]-DP21 | E3F[]-DP22 | E3F[]-DP23 | E3FA-DP24 | E3FA-DP25 | E3FA-DP26 | |||||||||||
| Sensing distance | 100 mm(white paper: 300 × 300 mm) | 300 mm(white paper: 300 × 300 mm) | 1 m(white paper: 300 × 300 mm) | 100 mm(white paper: 300 × 300 mm) | 300 mm(white paper: 300 × 300 mm) | 1 m(white paper: 300 × 300 mm) | |||||||||||
| Spot diameter(reference value) | 40 × 45 mmSensing distance of 100 mm | 40 × 50 mmSensing distance of 300 mm | 120 × 150 mmSensing distance of 1 m | 40 × 45 mmSensing distance of 100 mm | 40 × 50 mmSensing distance of 300 mm | 120 × 150 mmSensing distance of 1 m | |||||||||||
| Standard sensing object | -- | ||||||||||||||||
| Differential travel | 20% max. | ||||||||||||||||
| Directional angle | -- | ||||||||||||||||
| Light source (wavelength) | Red LED (624 nm) | Infrared LED (850 nm) | |||||||||||||||
| Power supply voltage | 10 to 30 VDC (including ripple ≤ 10% p-p) | ||||||||||||||||
| Current consumption | 25 mA max. | ||||||||||||||||
| Control output | NPN/PNP (open collector)Load current: 100 mA max. (Residual voltage ≤ 3 V), Vsup ≤ 30 VDC | ||||||||||||||||
| Operation mode | Light-ON/Dark-ON selectable by wiring | ||||||||||||||||
| Indicator | Operation indicator (orange)Stability indicator (green) | ||||||||||||||||
| Protection circuits | Reverse polarity, short-circuit and output reverse polarity protection, surge suppressor | ||||||||||||||||
| Response time | 0.5 ms | ||||||||||||||||
| Sensitivity adjustment | One-turn adjuster | ||||||||||||||||
| Ambient illumination(Receiver side) | Incandescent lamp: 3 000 lx max.Sunlight: 10 000 lx max. | ||||||||||||||||
| Ambient temperature range | Pre-wired: –25 to 55 °C / –40 to 70 °C (no icing)M12 connector: –40 to 55 °C / –40 to 70 °C (no icing) | ||||||||||||||||
| Ambient humidity range | Operating: 35 to 85 % / Storage: 35 to 95 % (no condensation) | ||||||||||||||||
| Insulation resistance | 20 MΩ min. at 500 VDC | ||||||||||||||||
| Dielectric strength | 1 000 VAC, 50/60 Hz for 1 min. | ||||||||||||||||
| Vibration resistance | 10–55 Hz, 1.5 mm amp. for 2 h each in X, Y, Z | ||||||||||||||||
| Shock resistance | 500 m/s², 3 times each in X, Y, Z | ||||||||||||||||
| Degree of protection | IP67 (IEC), IP69K (DIN 40050-9) | ||||||||||||||||
| Weight(packed / sensor only) | Pre-wired cable (2 m) | E3FA: 60 g / 50 g E3FB: 95 g / 65 g | |||||||||||||||
| Connector | E3FA: 20 g / 10 g E3FB: 50 g / 20 g | ||||||||||||||||
| Material | Case | E3FA: ABS E3FB: Nickel-brass | |||||||||||||||
| Lens and Display | PMMA | ||||||||||||||||
| Adjuster | POM | ||||||||||||||||
| Nut | E3FA: POM E3FB: Nickel-brass | ||||||||||||||||
| Accessories | Instruction sheetM18 nuts (2 pcs) | ||||||||||||||||
Sensors (E3FA Plastic housing)
| Sensor type | Sensing distance | Connection method | Model | |
|---|---|---|---|---|
| NPN output | PNP output | |||
Through-beam *1.
 |
20 m (Red light) | pre-wired | set E3FA-TN11 2M Emitter E3FA-TN11-L 2M Receiver E3FA-TN11-D 2M | set E3FA-TP11 2M Emitter E3FA-TP11-L 2M Receiver E3FA-TP11-D 2M |
| M12 connector | set E3FA-TN21 Emitter E3FA-TN21-L Receiver E3FA-TN21-D | set E3FA-TP21 Emitter E3FA-TP21-L Receiver E3FA-TP21-D | ||
| 15 m (Infrared light) | pre-wired | set E3FA-TN12 2M Emitter E3FA-TN12-L 2M Receiver E3FA-TN12-D 2M | set E3FA-TP12 2M Emitter E3FA-TP12-L 2M Receiver E3FA-TP12-D 2M | |
| M12 connector | set E3FA-TN22 Emitter E3FA-TN22-L Receiver E3FA-TN22-D | set E3FA-TP22 Emitter E3FA-TP22-L Receiver E3FA-TP22-D | ||
Retro-reflective
with MSR
function *2.
 |
0.1 to 4 m with E39-R1S (Red light) | pre-wired | E3FA-RN11 2M | E3FA-RP11 2M |
| M12 connector | E3FA-RN21 | E3FA-RP21 | ||
Coaxial Retro-
reflective
with MSR
function *2.
 |
0 to 500 mm with E39-R1S (Red light) | pre-wired | E3FA-RN12 2M | E3FA-RP12 2M |
| M12 connector | E3FA-RN22 | E3FA-RP22 | ||
Diffuse-reflective
 |
100 mm (Red light) | pre-wired | E3FA-DN11 2M | E3FA-DP11 2M |
| M12 connector | E3FA-DN21 | E3FA-DP21 | ||
| 300 mm (Red light) | pre-wired | E3FA-DN12 2M | E3FA-DP12 2M | |
| M12 connector | E3FA-DN22 | E3FA-DP22 | ||
| 1 m (Red light) | pre-wired | E3FA-DN13 2M | E3FA-DP13 2M | |
| M12 connector | E3FA-DN23 | E3FA-DP23 | ||
| 100 mm (Infrared light) | pre-wired | E3FA-DN14 2M | E3FA-DP14 2M | |
| M12 connector | E3FA-DN24 | E3FA-DP24 | ||
| 300 mm (Infrared light) | pre-wired | E3FA-DN15 2M | E3FA-DP15 2M | |
| M12 connector | E3FA-DN25 | E3FA-DP25 | ||
| 1 m (Infrared light) | pre-wired | E3FA-DN16 2M | E3FA-DP16 2M | |
| M12 connector | E3FA-DN26 | E3FA-DP26 | ||
BGS
(background
suppression)
 |
100 mm (Red light) | pre-wired | E3FA-LN11 2M | E3FA-LP11 2M |
| M12 connector | E3FA-LN21 | E3FA-LP21 | ||
| 200 mm (Red light) | pre-wired | E3FA-LN12 2M | E3FA-LP12 2M | |
| M12 connector | E3FA-LN22 | E3FA-LP22 | ||
Limited distance
reflective
 |
10 to 50 mm (Red light) | pre-wired | E3FA-VN11 2M | E3FA-VP11 2M |
| M12 connector | E3FA-VN21 | E3FA-VP21 | ||
Transparent detected
with P-opaquing
function *2.
 |
100 to 500 mm with E39-RP1 (Red light) | pre-wired | E3FA-BN11 2M | E3FA-BP11 2M |
| M12 connector | E3FA-BN21 | E3FA-BP21 | ||
Transparent detected
with P-opaquing
function *2.
 |
0.1 to 2 m with E39-RP1 (Red light) | pre-wired | E3FA-BN12 2M | E3FA-BP12 2M |
| M12 connector | E3FA-BN22 | E3FA-BP22 | ||
Sensors (E3RA Plastic housing)
| Sensor type | Sensing distance | Connection method | Model | |
|---|---|---|---|---|
| NPN output | PNP output | |||
Through-beam *1.
 |
15 m | pre-wired | set E3RA-TN11 2M Emitter E3RA-TN11-L 2M Receiver E3RA-TN11-D 2M | set E3RA-TP11 2M Emitter E3RA-TP11-L 2M Receiver E3RA-TP11-D 2M |
| M12 connector | set E3RA-TN21 Emitter E3RA-TN21-L Receiver E3RA-TN21-D | set E3RA-TP21 Emitter E3RA-TP21-L Receiver E3RA-TP21-D | ||
Retro-reflective
with MSR
function *2.
 |
0.1 to 3 m with E39-R1S | pre-wired | E3RA-RN11 2M | E3RA-RP11 2M |
| M12 connector | E3RA-RN21 | E3RA-RP21 | ||
Diffuse-reflective
 |
100 mm | pre-wired | E3RA-DN11 2M | E3RA-DP11 2M |
| M12 connector | E3RA-DN21 | E3RA-DP21 | ||
| 300 mm | pre-wired | E3RA-DN12 2M | E3RA-DP12 2M | |
| M12 connector | E3RA-DN22 | E3RA-DP22 | ||
| 700 mm | pre-wired | E3RA-DN13 2M | E3RA-DP13 2M | |
| M12 connector | E3RA-DN23 | E3RA-DP23 | ||
Sensors (E3FB/E3RB Metal housing)
| Sensor type | Sensing distance (Red light) | Connection method | Model | |
|---|---|---|---|---|
| NPN output | PNP output | |||
| Through-beam *1.
|
20 m | pre-wired | set E3FB-TN11 2M Emitter E3FB-TN11-L 2M Receiver E3FB-TN11-D 2M | set E3FB-TP11 2M Emitter E3FB-TP11-L 2M Receiver E3FB-TP11-D 2M |
| M12 connector | set E3FB-TN21 Emitter E3FB-TN21-L Receiver E3FB-TN21-D | set E3FB-TP21 Emitter E3FB-TP21-L Receiver E3FB-TP21-D | ||
| Retro-reflective
with MSR
function *2.
|
0.1 to 4 m with E39-R1S | pre-wired | E3FB-RN11 2M | E3FB-RP11 2M |
| M12 connector | E3FB-RN21 | E3FB-RP21 | ||
| Coaxial Retro-
reflective
with MSR
function *2.
|
0 to 500 mm with E39-R1S | pre-wired | E3FB-RN12 2M | E3FB-RP12 2M |
| M12 connector | E3FB-RN22 | E3FB-RP22 | ||
| Diffuse-reflective
|
100 mm | pre-wired | E3FB-DN11 2M | E3FB-DP11 2M |
| M12 connector | E3FB-DN21 | E3FB-DP21 | ||
| 300 mm | pre-wired | E3FB-DN12 2M | E3FB-DP12 2M | |
| M12 connector | E3FB-DN22 | E3FB-DP22 | ||
| 1 m | pre-wired | E3FB-DN13 2M | E3FB-DP13 2M | |
| M12 connector | E3FB-DN23 | E3FB-DP23 | ||
| BGS
(background
suppression)
|
100 mm | pre-wired | E3FB-LN11 2M | E3FB-LP11 2M |
| M12 connector | E3FB-LN21 | E3FB-LP21 | ||
| 200 mm | pre-wired | E3FB-LN12 2M | E3FB-LP12 2M | |
| M12 connector | E3FB-LN22 | E3FB-LP22 | ||
| Limited distance
reflective
|
10 to 50 mm | pre-wired | E3FB-VN11 2M | E3FB-VP11 2M |
| M12 connector | E3FB-VN21 | E3FB-VP21 | ||
| Transparent detected
with P-opaquing
function *2.
|
100 to 500 mm with E39-RP1 | pre-wired | E3FB-BN11 2M | E3FB-BP11 2M |
| M12 connector | E3FB-BN21 | E3FB-BP21 | ||
| Transparent detected
with P-opaquing
function *2.
|
0.1 to 2 m with E39-RP1 | pre-wired | E3FB-BN12 2M | E3FB-BP12 2M |
| M12 connector | E3FB-BN22 | E3FB-BP22 | ||
Through-beam *1.
 |
15 m | pre-wired | set E3RB-TN11 2M Emitter E3RB-TN11-L 2M Receiver E3RB-TN11-D 2M | set E3RB-TP11 2M Emitter E3RB-TP11-L 2M Receiver E3RB-TP11-D 2M |
| M12 connector | set E3RB-TN21 Emitter E3RB-TN21-L Receiver E3RB-TN21-D | set E3RB-TP21 Emitter E3RB-TP21-L Receiver E3RB-TP21-D | ||
Retro-reflective
with MSR
function *2.
 |
0.1 to 3 m with E39-R1S | pre-wired | E3RB-RN11 2M | E3RB-RP11 2M |
| M12 connector | E3RB-RN21 | E3RB-RP21 | ||
Diffuse-reflective
 |
100 mm | pre-wired | E3RB-DN11 2M | E3RB-DP11 2M |
| M12 connector | E3RB-DN21 | E3RB-DP21 | ||
| 300 mm | pre-wired | E3RB-DN12 2M | E3RB-DP12 2M | |
| M12 connector | E3RB-DN22 | E3RB-DP22 | ||
| 700 mm | pre-wired | E3RB-DN13 2M | E3RB-DP13 2M | |
| M12 connector | E3RB-DN23 | E3RB-DP23 | ||
Reflectors
| Sensor | Sensing distance | Appearance | Model | Quantity | Remarks |
|---|---|---|---|---|---|
| E3FA-R[]1 E3FB-R[]1 | 0.1 to 4 m |
 |
E39-R1S | 1 | for E3FA-R[], E3RA-R[], E3FB-R[] and E3RB-R[] |
| E3FA-R[]2 E3FB-R[]2 | 0 to 500 mm | ||||
| E3FA-B[]1 E3FB-B[]1 | 100 to 500 mm |
 |
E39-RP1 | 1 | for E3FA-B[] and E3FB-B[] |
| E3FA-B[]2 E3FB-B[]2 | 0.1 to 2 m |
Mounting brackets
| Sensor | Appearance | Model (Material) | Quantity | Remarks |
|---|---|---|---|---|
| all types |
 |
E39-L183 (SUS304) | 1 | Mounting bracket |
| E3FA-[] E3RA-[] |
 |
E39-L182 (POM) | 1 | Flush mounting bracket |
Sensor I/O connectors
| Sensor | Size | Cable | Appearance | Cable type | Model | ||
|---|---|---|---|---|---|---|---|
| M12 connector types | M12 | Standard | Straight |
 |
2 m | 4-wire | XS2F-M12PVC4S2M |
| 5 m | XS2F-M12PVC4S5M | ||||||
| Angle |
 |
2 m | XS2F-M12PVC4A2M | ||||
| 5 m | XS2F-M12PVC4A5M | ||||||
|
Catalog Name
|
Catalog Number[size]
|
Last Update
|
|
|---|---|---|---|
| E3FA Catalog | E423-E1-04[8688KB] | Jan 27, 2025 | E3FA Catalog |
| E3FA, E3RA, E3FB, E3RB Data Sheet | E424-E1-04[6095KB] | Jan 27, 2025 | E3FA, E3RA, E3FB, E3RB Data Sheet |
Applications
- Object detection on conveyors and production lines
- Packaging machine sensors for cartons, bottles, and bags
- Transparent film or glass detection using retro-reflective models
- Level detection for material presence in bins or feeders
- Entry sensors in automated door or gate systems
Why Choose
- Quick installation in confined spaces
- High detection accuracy, even in dirty or dusty environments
- Supports all standard sensing needs in one compact product family
- Stable and long-term operation, even in challenging conditions
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