Small Diameter Inductive Proximity Sensors, range from 0.8 to 3mm
Buy IR Proximity Sensor for Arduino at Rajguruelectronics.com
touchless proximity on/off hand sensor switch| Alibaba.com
Infrared Proximity Sensor Using Transistors and IR LED eBook by GURUJI - EPUB Book | Rakuten Kobo United States
Mini PCB LED Strip Light Controller No Need Touch Hand Wave LED Proximity Sensor LED Strip Sensor Switch - China LED Dimmer, IR Sensor | Made-in-China.com
Proximity sensor switch – SEMI LIGHT
FESTO SMEO-1-LED-230-B PROXIMITY SENSOR - Platinum International
Proximity Sensors with LED indicator, Sensing range - 2mm to 15mm