HC-SR501 Adjustable PIR Pyroelectric Motion Sensor Module
Key Features
Model: HC-SR501 PIR Motion Sensor
Detection Principle: Passive Pyroelectric Infrared Heat Signature
Operating Voltage: 5V to 20V DC
Output Format: 3.3V High/Low Digital signal
Delay Configuration: Dual onboard trim pots (Time & Sensitivity adjustments)
The PIR Sensor detects motion by monitoring changes in the infrared heat signatures radiating from humans or animals across a room. It features a plastic Fresnel lens cover that focuses the incoming thermal energy onto its internal sensor element.