Omron E3S-AR36 — 2 m Polarised Retro Sensor, PNP
SKU: E3S-AR36USD 82.00
Vertical-body E3S-A photoelectric sensor, 2 m polarised retro with MSR, red LED, PNP, 10-30 VDC, M12 connector, IP67.
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Product Overview
The Omron E3S-AR36 is a compact photoelectric sensor with a polarised retroreflective head and built-in amplifier. The vertical body houses a red 624 nm LED plus a polarising filter that rejects the specular return from shiny surfaces, allowing detection of shrink-wrap packaging, polished metal blanks, and glossy labels when the matched E39-R1 reflector is mounted opposite. With the reflector the unit reaches 2 m on a 100 mm minimum target. The M12 4-pin connector, PNP open-collector output, and 10-30 VDC supply make it a drop-in fit for most PLC control cabinets. Pick the E3S-AR36 when the target is glossy enough to confuse a standard retro-reflective sensor.
Where it fits in the E3S-A family
The E3S-A line is split by detection method. E3S-AR36 is the polarised retro-reflective vertical-body sensor with MSR. E3S-AR31 is the horizontal-body sibling of the same polarised retro. E3S-AD36 / AD37 are the diffuse-reflective 20 cm / 70 cm units. E3S-AT36 is the through-beam pair at 7 m. The plain E3S-R36 (without MSR) reads matte surfaces at the same 2 m range; the AR36 adds the polarising filter for shiny-target applications. For shrink-wrap, PET bottles, or polished metal blanks at 1-2 m, the AR36 is the right pick.
Choosing between the connector versions
The Omron E3S-A series ships in two wiring styles. The -AR36 suffix is the M12 4-pin connector version; the -AR36 2M suffix swaps the connector for a pre-wired 2 m oil-resistant PVC cable. Connector variants fit machine builders that already have M12 cordset stock; pre-wired versions save a connector pair on every install. Both share the same NEMA 4X / 6 + IP67 housing and E39-L70 vertical mounting bracket (supplied).
Before ordering
Confirm the target has enough retroreflective return for a polarised sensor at 2 m - opaque matte targets are best. Pick the E39-R1 reflector that ships with the unit, or step up to E39-R2 for a tighter beam. The supply is 10-30 VDC at 30 mA max; route a common ground with the PLC input common. Wire the M12 connector per Omron pin map (brown = +V, blue = 0 V, black = output). Set the rear Light-ON / Dark-ON switch before commissioning.
Key Features
- E3S-A series vertical-body photoelectric sensor
- Polarised retro-reflective with MSR (mirror surface rejection)
- 2 m range with the included E39-R1 reflector
- Red LED 624 nm source, polarising filter for shiny targets
- PNP open-collector output, 100 mA max load
- 10-30 VDC supply, 30 mA current draw
- M12 4-pin connector
- Light-ON / Dark-ON selectable on rear switch
- 0.5 ms response time
- IP67 / NEMA 4X / 6 rated housing, -25 to 55 degC
- E39-L70 vertical mounting bracket supplied
- SKU: E3S-AR36
- Series: E3S-A photoelectric sensor with built-in amplifier
- Voltage: 10-30 VDC
- I/O: 100 I/O
Best-Fit Applications
- Detecting shrink-wrapped cartons on a fast packaging conveyor line
- Sensing polished metal blanks on a press-feed conveyor
- Trigger on glossy label edges for print-and-apply stations
- PET bottle detection in a wash or fill line
- Presence check on an unloading or palletising station
Buying Checklist
- Confirm the target is shiny enough to need a polarised (MSR) sensor; use plain E3S-R36 for matte surfaces.
- Choose E3S-AT36 for 7 m through-beam where space is too tight for a reflector path.
- Choose E3S-AD37 for diffuse-reflective 70 cm when a reflector is impractical.
- Choose the -AR36 2M (pre-wired) variant when an M12 cordset is not already on hand.
- Verify the supply is 10-30 VDC with a common 0 V tied to the PLC input common.
- Allow for the E39-R1 reflector (supplied) to be mounted opposite on the target path.
Technical Specifications
| Series | E3S-A photoelectric sensor with built-in amplifier |
|---|---|
| Detection Method | Polarised retro-reflective with MSR |
| Sensing Distance | 2 m with E39-R1 reflector (included) |
| Light Source | Red LED, 624 nm |
| Output Type | PNP open-collector, 100 mA max |
| Operation Mode | Light-ON / Dark-ON selectable |
| Supply Voltage | 10-30 VDC |
| Current Consumption | 30 mA max at 24 VDC |
| Response Time | 0.5 ms |
| Connection | M12 4-pin connector |
| Protection Rating | IP67 (IEC 60529), NEMA 4X / 6 |
| Operating Temperature | -25 to 55 degC |
Resources & Downloads
FAQ for E3S-AR36
What is the difference between E3S-AR36 and E3S-R36?
The E3S-AR36 is the polarised retro-reflective version with mirror-surface rejection (MSR) for shiny targets. The plain E3S-R36 is a standard retro-reflective without the polarising filter. Pick AR36 for shrink-wrap, polished metal, or PET bottles; pick R36 for matte surfaces at the same 2 m range.
Does the E3S-AR36 work at 24 VDC?
Yes. The supply range is 10-30 VDC, which covers the standard 24 VDC sensor rail found in most PLC control cabinets. The unit draws about 30 mA at 24 VDC and switches up to 100 mA into the connected load through its PNP output stage.
Which reflector does the E3S-AR36 ship with?
The E3S-AR36 ships with an E39-R1 reflector that supports the full 2 m range. To extend range, use the larger E39-R2 or E39-R7 reflector; to tighten the spot, use the E39-RP1 polarising reflector or the small E39-R3 / E39-R4 stick-on reflector.
Can the E3S-AR36 detect clear PET bottles?
Polarised retro-reflective detects most opaque shiny objects but not all clear PET. For clear PET bottle detection at 500 mm, use the E3Z-B61 2M (clear-PET retro) or E3Z-B86 (PNP M8 connector). For BGS / distance-settable clear-bottle detection, use the E3Z-LL86 BGS laser.
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