![[OMRON] — E3S-A Retro-reflective Photoelectric Sensor (2m, Horizontal/Vertical, NPN/PNP)](https://img.prosourcemro.com/2026/05/001-344-1024x1024.png)
Photoelectric
Omron
[OMRON] — E3S-A Retro-reflective Photoelectric Sensor (2m, Horizontal/Vertical, NPN/PNP)
Family ID: OMRON-E3S-A-RETRO
OMRON E3S-A Series medium-size retro-reflective photoelectric sensors. 2 m red light (min 100 mm from reflector). Horizontal and Vertical. NPN and PNP. Standard and function variant. E39-R1 reflector included. Pre-wired 2 m and M12 connector.
12 product codes available in this family
Product Codes & Specifications
| Product Code | Description | Brand | Spec | ||
|---|---|---|---|---|---|
| E3S-AR11 2M | Retro Horizontal Standard NPN 2m | OMRON | Sensing Distance: 2 m (min 100 mm) | Light Source: Red light | Sensing Method: Retro-reflective (Horizontal) | Output: NPN | Orientation: Horizontal | Function: Standard | Reflector: E39-R1 included with sensor; E39-R3/R4/RS1~RS3 sold separately | Connection: Pre-wired 2 m | ||
| E3S-AR16 | Retro Horizontal NPN M12 | OMRON | Sensing Distance: 2 m (min 100 mm) | Light Source: Red light | Sensing Method: Retro-reflective (Horizontal) | Output: NPN | Orientation: Horizontal | Function: Standard | Reflector: E39-R1 included with sensor; E39-R3/R4/RS1~RS3 sold separately | Connection: M12 Connector | Required Cable: Requires XS2F-D421-DC0-F (2m) / XS2F-D421-GC0-F (5m) straight or XS2F-D422 L-shape (sold separately) | Note: M12 model shared between Standard and Function variant | ||
| E3S-AR31 2M | Retro Horizontal Standard PNP 2m | OMRON | Sensing Distance: 2 m (min 100 mm) | Light Source: Red light | Sensing Method: Retro-reflective (Horizontal) | Output: PNP | Orientation: Horizontal | Function: Standard | Reflector: E39-R1 included with sensor; E39-R3/R4/RS1~RS3 sold separately | Connection: Pre-wired 2 m | ||
| E3S-AR36 | Retro Horizontal PNP M12 | OMRON | Sensing Distance: 2 m (min 100 mm) | Light Source: Red light | Sensing Method: Retro-reflective (Horizontal) | Output: PNP | Orientation: Horizontal | Function: Standard | Reflector: E39-R1 included with sensor; E39-R3/R4/RS1~RS3 sold separately | Connection: M12 Connector | Required Cable: Requires XS2F-D421-DC0-F (2m) / XS2F-D421-GC0-F (5m) straight or XS2F-D422 L-shape (sold separately) | Note: M12 model shared between Standard and Function variant | ||
| E3S-AR21 2M | Retro Horizontal Function variant NPN 2m | OMRON | Sensing Distance: 2 m (min 100 mm) | Light Source: Red light | Sensing Method: Retro-reflective (Horizontal) | Output: NPN | Orientation: Horizontal | Function: Function variant | Reflector: E39-R1 included with sensor; E39-R3/R4/RS1~RS3 sold separately | Connection: Pre-wired 2 m | ||
| E3S-AR41 2M | Retro Horizontal Function variant PNP 2m | OMRON | Sensing Distance: 2 m (min 100 mm) | Light Source: Red light | Sensing Method: Retro-reflective (Horizontal) | Output: PNP | Orientation: Horizontal | Function: Function variant | Reflector: E39-R1 included with sensor; E39-R3/R4/RS1~RS3 sold separately | Connection: Pre-wired 2 m | ||
| E3S-AR61 2M | Retro Vertical Standard NPN 2m | OMRON | Sensing Distance: 2 m (min 100 mm) | Light Source: Red light | Sensing Method: Retro-reflective (Vertical) | Output: NPN | Orientation: Vertical | Function: Standard | Reflector: E39-R1 included with sensor; E39-R3/R4/RS1~RS3 sold separately | Connection: Pre-wired 2 m | ||
| E3S-AR66 | Retro Vertical NPN M12 | OMRON | Sensing Distance: 2 m (min 100 mm) | Light Source: Red light | Sensing Method: Retro-reflective (Vertical) | Output: NPN | Orientation: Vertical | Function: Standard | Reflector: E39-R1 included with sensor; E39-R3/R4/RS1~RS3 sold separately | Connection: M12 Connector | Required Cable: Requires XS2F-D421-DC0-F (2m) / XS2F-D421-GC0-F (5m) straight or XS2F-D422 L-shape (sold separately) | Note: M12 model shared between Standard and Function variant | ||
| E3S-AR81 2M | Retro Vertical Standard PNP 2m | OMRON | Sensing Distance: 2 m (min 100 mm) | Light Source: Red light | Sensing Method: Retro-reflective (Vertical) | Output: PNP | Orientation: Vertical | Function: Standard | Reflector: E39-R1 included with sensor; E39-R3/R4/RS1~RS3 sold separately | Connection: Pre-wired 2 m | ||
| E3S-AR86 | Retro Vertical PNP M12 | OMRON | Sensing Distance: 2 m (min 100 mm) | Light Source: Red light | Sensing Method: Retro-reflective (Vertical) | Output: PNP | Orientation: Vertical | Function: Standard | Reflector: E39-R1 included with sensor; E39-R3/R4/RS1~RS3 sold separately | Connection: M12 Connector | Required Cable: Requires XS2F-D421-DC0-F (2m) / XS2F-D421-GC0-F (5m) straight or XS2F-D422 L-shape (sold separately) | Note: M12 model shared between Standard and Function variant | ||
| E3S-AR71 2M | Retro Vertical Function variant NPN 2m | OMRON | Sensing Distance: 2 m (min 100 mm) | Light Source: Red light | Sensing Method: Retro-reflective (Vertical) | Output: NPN | Orientation: Vertical | Function: Function variant | Reflector: E39-R1 included with sensor; E39-R3/R4/RS1~RS3 sold separately | Connection: Pre-wired 2 m | ||
| E3S-AR91 2M | Retro Vertical Function variant PNP 2m | OMRON | Sensing Distance: 2 m (min 100 mm) | Light Source: Red light | Sensing Method: Retro-reflective (Vertical) | Output: PNP | Orientation: Vertical | Function: Function variant | Reflector: E39-R1 included with sensor; E39-R3/R4/RS1~RS3 sold separately | Connection: Pre-wired 2 m |
