Omron Retroreflective Photoelectric Sensor, Barrel Sensor, 100 mm → 3 m Detection Range

View all Photoelectric Sensors

Subtotal (1 unit)*

£71.90

(exc. VAT)

£86.28

(inc. VAT)

Add to Basket
Select or type quantity
In Stock
  • Plus 7 unit(s) shipping from 27 October 2025
  • Plus 4 unit(s) shipping from 12 February 2026
Need more? Click ‘Check delivery dates’ to find extra stock and lead times.
Units
Per unit
1 +£71.90

*price indicative

Photoelectric Sensors to Sensors & Actuator Cables
Don’t Forget the Cables
Photoelectric sensors need the right cables to connect, communicate, and perform reliably. Our range of sensors & actuator cables are designed for secure connections, fast installation, and long-lasting durability. If you're selecting sensors, make sure to explore compatible cables to complete your setup and ensure optimal performance in your application.
Shop Now
RS Stock No.:
768-6024
Mfr. Part No.:
E3RA-RN21
Brand:
Omron
Find similar products by selecting one or more attributes.
Select all

Brand

Omron

Sensor Style

Barrel

Detection Type

Retroreflective

Detection Range

100 mm → 3 m

Output Type

NPN

Electrical Connection

M12 4 Pin Connector

Maximum DC Voltage

30V

Light Source

Red LED

IP Rating

IP67, IP69K

Maximum Current

25 mA

Response Time

500 μs

Housing Material

ABS

Minimum Operating Temperature

-25°C

Maximum Operating Temperature

+55°C

Series

E3RA

Omron E3RA Series Photoelectric Sensor, 100mm to 3m Detection Range, NPN Output Type - E3RA-RN21


This photoelectric sensor is a high-performance device designed for reliable presence detection. With a barrel style and a detection range spanning from 100mm to 3m, it excels in various industrial applications. Built from durable ABS housing, this sensor is both waterproof and dustproof, rated IP67 and IP69K. Its compact design ensures easy mounting in diverse installations.

Features & Benefits


• Fast response time of 500μs ensures quick detection
• M12 connector facilitates straightforward electrical connections
• Robust build withstands high-pressure cleaning environments
• Low power consumption of 25mA aids in energy efficiency

Applications


• Ideal for food and beverage processing lines
• Suitable for textile and ceramics production machinery
• Utilised in the logistics sector for automated systems
• Effective in packaging requiring reliable detection
• Applicable in environments needing high EMC protection

How does it handle extreme environmental conditions?


The sensor is designed to operate in extreme conditions, functioning efficiently in temperatures from -25 to +55 °C and maintaining its integrity in humid and dusty environments due to its IP67 and IP69K ratings.

What type of output can I expect from this sensor?


As a standard NPN output sensor, it provides a reliable switching function, facilitating seamless integration into various automation systems.

How can I ensure optimal positioning when installing the sensor?


Utilising the bright red LED, you can easily align the sensor from significant distances, allowing for straightforward installation without extensive adjustments.

What are the advantages of using a barrel style sensor?


The barrel style offers versatility for mounting in tight spaces while ensuring that the detection technology remains effective and reliable within various applications.


E3F2 Series Barrel


Output can be configured by wiring either ’light ON’ or ’dark ON’
Built in amplifier
Short circuit and reverse polarity protection
M18 DIN size cylindrical housing

Related links