Part of the Omron Photoelectric Sensors series — see the full model table, lifecycle status and replacement parts.
Omron E3FA-RP11 2M — 4 m M18 Retro-Reflective Sensor, PNP
SKU: E3FA-RP11 2MUSD 10.00
Omron E3FA-RP11 2M M18 retro-reflective photoelectric sensor, 0.1-4 m with E39-R1S reflector, PNP, red LED, IP67 / IP69K, 2 m cable.
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Product Overview
The Omron E3FA-RP11 2M is an M18 threaded-barrel retro-reflective photoelectric sensor with a 0.1 to 4 m sensing range, manufactured by Omron Corporation. Hengyixin Automation ships this sensor from our Xiamen warehouse with a 30-day DOA return window and a datasheet PDF included in the box.
The head is 18 mm diameter ABS plastic with a PMMA lens and a polarised red 624 nm LED. It detects opaque objects between the head and an E39-R1S reflector (sold separately) and ignores reflections from shiny surfaces thanks to the built-in MSR (Mirror Surface Rejection) filter. Output is one PNP open-collector channel rated 30 VDC at 100 mA, switchable between Light-ON and Dark-ON. Supply is 10 to 30 VDC; response time is 0.5 ms.
The body is IP67 / IP69K and mounts with the supplied M18 POM nut; the cable is 2 m pre-wired. For the same sensor with an M12 connector instead of a cable, pick the E3FA-RP21. For an NPN output twin, pick the E3FA-RN11.
Key Features
- M18 threaded-barrel retro-reflective photoelectric sensor, 0.1 to 4 m range with E39-R1S reflector
- PNP open-collector output, Light-ON / Dark-ON selectable, 30 VDC and 100 mA max
- Polarised red 624 nm LED with built-in MSR filter for shiny targets
- 10 to 30 VDC supply, 0.5 ms response, IP67 / IP69K ABS body, 2 m pre-wired cable
- SKU: E3FA-RP11 2M
- Series: Omron E3FA cylindrical photoelectric sensor
- Voltage: 10 TO 30 VDC
Best-Fit Applications
- Bottle and can detection on a washdown conveyor in a beverage filling line where IP69K survives daily high-pressure cleaning
- Detecting shiny metal stampings on a parts feeder where the MSR polarising filter rejects false reflections from polished steel
- Pallet presence check at an AGV docking station, 4 m range across the lane and 0.5 ms response keeps pace
Buying Checklist
- Pick the E3FA-RP11 2M for an M18 PNP retro-reflective sensor with a 2 m pre-wired cable and IP67 / IP69K sealing.
- Pick the E3FA-RP21 instead when the cabinet needs an M12 connector instead of a pre-wired cable on the same PNP head.
- Pick the E3FA-RN11 instead when the PLC input expects an NPN signal in the same M18 retro-reflective housing.
Technical Specifications
| Manufacturer | Omron Corporation (Japan) |
|---|---|
| Series | Omron E3FA cylindrical photoelectric sensor |
| Model / SKU | E3FA-RP11 2M |
| Sensing Method | Retro-reflective with MSR (polarised) |
| Sensing Distance | 0.1 to 4 m with E39-R1S reflector |
| Light Source | Polarised red LED, 624 nm |
| Output Type | PNP open collector, Light-ON / Dark-ON selectable |
| Load Current | 100 mA max at 30 VDC |
| Supply Voltage | 10 to 30 VDC |
| Current Consumption | 25 mA max |
| Response Time | 0.5 ms operate / reset |
| Housing / IP / Cable | ABS / PMMA; M18 nut; IP67 / IP69K; 2 m pre-wired |
FAQ for E3FA-RP11 2M
What reflector does the Omron E3FA-RP11 2M need?
Use the Omron E39-R1S reflector (40 x 60 mm, sold separately). With it the sensor reaches the full 0.1 to 4 m range. Smaller E39-R7 round reflectors also work but at shorter range.
Can the E3FA-RP11 2M detect shiny or mirrored objects?
Yes. The MSR (Mirror Surface Rejection) polarising filter blocks the specular reflection from polished metal and glossy plastic, so the sensor only triggers on the beam returning from the dedicated reflector.
E3FA-RP11 2M vs E3FA-RP21 — what is the difference?
Output wiring. The RP11 2M has a 2 m pre-wired cable. The RP21 has an M12 4-pin connector on the back of the head instead, which is easier to swap out in the field but needs a separate M12 cordset.
What supply voltage does the E3FA-RP11 2M need?
10 to 30 VDC. It draws 25 mA max and switches up to 100 mA into a PNP load. The brown lead is +V, the blue lead is 0 V, the black lead is the PNP output and the white lead is not used.
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