Omron E3FA-RP21 Photoelectric Sensor
Omron E3FA-RP21 Photoelectric Sensor offers a cylindrical axial design with retro-reflective MSR function and a sensing range of 0.1 to 4 m using the E39-R1S reflector. It features PNP output, an M12 connector, a red LED light source, and operates on 10 to 30 VDC with Light-ON/Dark-ON mode. Manufactured by Omron, this unit is part of the industrial photoelectric sensors family and belongs to the E3FA sensor series, providing accurate and reliable detection for automation applications.
| Brand | Omron |
| Product | Photoelectric Sensors |
| Model Number | E3FA-RP21 |
Omron E3FA-RP21 Photoelectric Sensor – Technical Specifications
| Specification | Value |
|---|---|
| Sensing Method | Retro-reflective with MSR function |
| Shape | Cylindrical axial |
| Sensing Distance | 0.1 to 4 m with E39-R1S |
| Power Supply Voltage | 10 to 30 VDC |
| Output Configuration | PNP |
| Connection Method | M12 Connector |
| Power Consumption | 25 mA max. |
| Light Source (Wavelength) | Red LED |
| Thread Size | M18 |
| Length | 45 mm |
| Operation Mode | Light-ON/Dark-ON |
| Response Time | 0.5ms |
| Degree Of Protection | IP67/IP69K |
| Material Housing | ABS |
| Features | M.S.R. |
The Omron E3FA-RP21 is designed for precise object detection in industrial automation systems. Its retro-reflective MSR configuration and 0.1–4 m sensing distance make it suitable for conveyor monitoring, machine safety, and automated production lines. Engineers select this sensor for its PNP output, red LED illumination, and compact cylindrical axial housing, which ensures durability in limited-space panels.
In practical applications, the E3FA-RP21 maintains stable and repeatable detection, supporting Light-ON and Dark-ON operation modes. The M12 connector and 10–30 VDC power supply allow easy integration into existing control setups, while the sensor’s robust construction and IP67/IP69K protection ensure reliable performance under harsh industrial conditions. This makes it ideal for automated material handling and high-speed motion detection.
From a system integration perspective, the Omron E3FA-RP21 aligns with industry standards for retro-reflective photoelectric sensors. Its compact 45 mm housing, consistent signal output, and flexible pre-wired design simplify installation and maintenance. This sensor provides dependable object detection across various automation scenarios, making it a preferred choice for engineers requiring precision, reliability, and long-term performance in industrial environments.
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