E3Z-R81 2M Omron Photoelectric Sensor

Here’s an image of the Omron E3Z‑R81 2 m Retro‑Reflective Photoelectric Sensor. Now, let’s dive into what makes this sensor a great fit for industrial automation—and how you can present it effectively on your website.

Product Overview

The Omron E3Z‑R81 2 M is a compact, retro‑reflective photoelectric sensor featuring built-in amplification. It uses a polarized red LED light source and includes mutual interference suppression (M.S.R.) to ensure reliability in multi-sensor environments. ia.omron.comindustrial.omron.co.za

Key Specifications

• Sensing Method: Retro‑reflective with M.S.R. function ia.omron.comomron.sotirtho.org

• Sensing Distance: 100 mm to 4 m when using Omron reflector E39‑R1S (up to 3 m with E39‑R1) ia.omron.comomron.sotirtho.org

• Light Source: Red LED, around 660 nm wavelength ia.omron.comomron.sotirtho.org

• Power Supply: 12–24 V DC (±10%), max ripple 10% ia.omron.comomron.sotirtho.org

• Output Type: PNP open-collector, selectable Light‑ON / Dark‑ON ia.omron.comomron.sotirtho.org

• Load Capacity: Up to 100 mA; residual voltage ≤ 1 V (<10 mA) or ≤ 2 V (10–100 mA) omron.sotirtho.orgia.omron.com

• Response Time: ≤ 1 ms ia.omron.com+1

• Indicators: Operation (orange) and stability (green) LEDs ia.omron.com+1

• Housing: PBT resin, IP67 protection (dust and water resistant) industrial.omron.co.zaia.omron.com

• Ambient Light Tolerance: Up to 3,000 lx (incandescent); up to 10,000 lx (sunlight) ia.omron.com

• Other Protections: Reverse polarity, short‑circuit, and mutual interference safeguards ia.omron.com+1

• Weight & Dimensions: Approx. 65 g (with 2 m cable); compact footprint (~10.8 mm × 20 mm × 31 mm) industrial.omron.co.zaia.omron.com

Recommended Accessories

To complete your setup, consider these optional accessories from Omron: industrial.omron.co.za

• Reflectors:

  • E39‑R1S (40 × 60 × 7.5 mm, standard)

  • Other sizes and shapes like E39‑R40, E39‑R7, reflective tapes E39‑RS1/RS2/RS3/RS50

• Mounting Brackets:

  • E39‑L104 (vertical standard),

  • E39‑L43 (side), E39‑L44 (rear), E39‑L150/151 (posts), E39‑L142/144 (protective walls), etc.

How to Use (Setup Guide)

1. Mount Sensor & Reflector
   Position the sensor facing the reflector in line with the optical axis. Use appropriate mounting hardware for sturdy installation.

2. Wiring
   Supply 12–24 V DC and connect the PNP output to PLC or control circuits. Ensure proper polarity and observe protection guidelines.

3. Sensitivity & Mode Adjustment
   Use the one-turn sensitivity dial to fine-tune detection threshold. Choose between Light‑ON (output when light is detected) or Dark‑ON (output when the path is blocked).

4. Indicator Check

   • Orange LED: lights when detection occurs

   • Green LED: lights when detection is stable

5. Testing
   Place and remove an object to test switching logic. Adjust dial to eliminate false triggers.

6. Environmental Considerations
   Clean lenses and reflectors periodically in dusty or bright environments to preserve reliability. Up to IP67 ensures robust performance in most industrial setups.

Feature Highlights

Website Presentation Suggestions

Page Title Idea:
Omron E3Z‑R81‑2 M Retro‑Reflective Photoelectric Sensor

Lead Bullet Summary:

• Sensing Range: 0.1 – 4 m (with E39‑R1S reflector)

• Output: PNP, Light‑ON / Dark‑ON selectable

• Fast Response: ≤ 1 ms

• Protection Rating: IP67 for harsh environments

• Highlights: Mutual interference suppression, dual LEDs, compact design

Detailed Tabs:

• Specifications: Include above data point-by-point

• How to Use: Setup and configuration guidance

• Accessories: Display reflective options and bracket choices

• Datasheet & Downloads: Link to Omron datasheet PDF

• Benefits: Industrial reliability, flexibility in integration, compact form

Visuals:

• Use the sensor image above as a product visual

• Add wiring diagrams, mounting visuals, and close-ups of LEDs and adjustment dial for clarity