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
Smart Automatic Curtain Opener - Remote Control with App/Timer/Voice,Upgraded High-Performance Motor, Automatic Light Sensor, Add Gateways, For Google Alexa, No Remote (Only for T/U tracks) - Amazon.com
Photoelectric Protection Sensors, 4 Optical Axes Safety Light Curtain for Home Decoration - Amazon.com
Safety Light Curtains, Infrared Light Curtain Sensor 8‑33V DC Easy Installation High Accuracy Good Safety Alarm Function Wide Application for Home (10m): Amazon.com: Industrial & Scientific
ASI 957901050 Finger Safety Light Curtain Sensor, Type 4, 24 VDC, 0.2 m to 6 m Operating Distance, 900 mm Controlled Height: Amazon.com: Industrial & Scientific
Safety Light Curtains, Infrared Light Curtain Sensor 8‑33V DC Easy Installation High Accuracy Good Safety Alarm Function Wide Application for Home (10m): Amazon.com: Industrial & Scientific