Product Description

The Keyence PR-F51N3 is a compact, self-contained photoelectric sensor designed for precise through-beam detection applications. Its flat, transmissive design allows for a detection distance of up to 0.6 meters, making it ideal for detecting small or closely spaced objects. The sensor offers both Light-ON and Dark-ON output modes, providing flexibility for various control systems. With a response time of 0.5 ms and a spot diameter of approximately 2.5 x 4.5 mm at 15 mm detection distance, it ensures quick and accurate detection. The PR-F51N3 is housed in a durable SUS316L stainless steel casing and is rated IP67, IP69K, and NEMA 4X, 6P, 13, ensuring reliable performance in harsh industrial environments.​

Technical Specifications

• Model: PR-F51N3
• Type: Through-beam
• Output Type: NPN
• Shape: Flat
• Cable Length: 3 meters
• Detection Distance: Up to 0.6 meters
• Output Modes: Light-ON, Dark-ON
• Response Time:
• Light-ON: 0.5 ms
• Dark-ON: ON→OFF: 2.7 ms, OFF→ON: 0.5 ms
• Spot Diameter: Approx. 2.5 x 4.5 mm at 15 mm
• Light Source: 4-element, point light source, red LED (650 nm)
• Control Output: Up to 30 VDC, 50 mA
• Supply Voltage: 10 to 30 VDC (including ripple)
• Current Consumption:
• Transmitter: 11 mA
• Receiver: 16 mA
• Protection Class: IP67, IP69K, NEMA 4X, 6P, 13
• Ambient Temperature: -25 to +55°C
• Storage Temperature: -25 to +75°C
• Housing Material: SUS316L Stainless Steel
• Weight: Approx. 80 g