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Office of Highway Policy Information - Policy | Federal Highway Administration
Sensors | Free Full-Text | Monitoring Indoor People Presence in Buildings Using Low-Cost Infrared Sensor Array in Doorways
HiLetgo 3pcs AM312 Mini Pyroelectric PIR Human Sensor Module PIR Infrared IR Sensor Body Manual Motion Infrared IR Detector, Motion Detectors - Amazon Canada
PIR (motion) sensor : ID 189 : $9.95 : Adafruit Industries, Unique & fun DIY electronics and kits
Olideauto Passive Infrared PIR Sensor, Motion Sensor, Body Sensor for Automatic Door, Motion Detectors - Amazon Canada
How do passive infrared triggered camera traps operate and why does it matter? Breaking down common misconceptions - Welbourne - 2016 - Remote Sensing in Ecology and Conservation - Wiley Online Library