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Amazon.com : Seco-Larm E-9660-8B25 IR Curtain Sensors for Indoor/Outdoor Access Control with 8 Photoelectric Beams, Up to 25ft Outdoor and 50ft Indoor Range, NO/NC Relay Output and LED Alignment Indicator : Motion
Walfront Safety Light Curtain, Infrared Protection Sensor Device NPN NO Mounting Accessories DC10‑30V Used in Stamping Machinery, Automated Welding Lines, Sensor - - Amazon.com
Amazon.com: Seco-Larm E-9622-4B25 IR Curtain Sensors for Indoor/Outdoor Access Control, Four Photoelectric Beams, Up to 25ft Outdoor and 50ft Indoor Range, NO/NC Relay Output, LED Alignment Indicator : Electronics
Amazon.com: Grating Sensor, Safety Light Curtain Far Infrared Light Screen Sensor for Stamping Machinery for Production Line : Industrial & Scientific