Omron E3FA-RP21 | Compact Retro-Reflective Sensor for General Industrial Use Overview The Omron E3FA-RP21 is a retro-reflective photoelectric sensor offering a sensing distance of up to 4 meters with a PNP transistor output, ideal for detecting objects in standard industrial environments. With a compact cylindrical design and a 10–30 VDC power supply, it's easy to install in space-constrained applications. Key Features Sensing Method: Retro-reflective (requires reflector) Sensing Distance: Up to 4 meters with E39-R1 reflector Output Type: PNP (Light ON/Dark ON selectable) Power Supply: 10–30 VDC Housing Shape: Cylindrical M18 body LED Indicators: Power and operation status High EMC Resistance: Stable performance in noisy environments Compact and Lightweight: Easy to mount in tight spaces Enclosure Rating: IP67 for moisture and dust protection Technical Specifications Model: E3FA-RP21 Sensing Distance: 4 m (with E39-R1 reflector) Light Source: Red LED Output Type: PNP open collector Power Supply: 10–30 VDC Current Consumption: ≤ 30 mA Response Time: ≤ 1 ms Enclosure Rating: IP67 Ambient Operating Temperature: –25°C to +55°C Housing Material: PBT plastic Lens Material: PMMA Mounting: M18 threaded or bracket mount Dimensions: Ø18 × 34 mm (approx.) Weight: Approx. 50 g Applications Packaging Machines Automated Lines Material Handling Systems Small Part Detection Conveyor Object Sensing Why Choose Omron E3FA-RP21? Compact and cylindrical design fits most setups Stable detection with 4 m range using reflector Quick installation with M18 threaded mounting IP67-rated durability for demanding industrial environments
