Light,IR & Radiation
    8-Ch way Line Detecting Tracking IR Infr...
    15mA 5V Optical Infrared Water Liquid Le...
    Communication IR Based Infrared module
    5-Ch way Line Tracking Infrared Sensor B...
    4 key IR Remote Control
    180 Degree 12V Human Infrared Sensor Swi...
    Doppler Radar Microwave Sensor Switch Mo...
    LM393 Optical light-sensitive detection ...
    APDS-9900 Environment Sensor for Arduino...
    5mm Infrared Transmitting IR LED 940nm
    IR Infrared Remote
    PIR Sensor IR RE200B Human Motion Radiat...