2-Pack HC-SR501 PIR Motion Sensor Module with Adjustable Sensitivity & Delay, 5V DC, for Arduino Compatible, Green PCB‌

The HC-SR501 PIR Motion Sensor Module is a precision-engineered passive infrared detection system designed for reliable motion sensing in smart home, security, and DIY electronics applications. Built with a high-sensitivity pyroelectric sensor and a precision Fresnel lens, it detects human movement up to 7 meters away at a 110° horizontal angle, triggering a clean 3.3V digital output signal upon detection. With two onboard potentiometers, users can easily adjust sensitivity and delay time (0.5s to 200s) to suit diverse environments—from dimly lit corridors to outdoor entryways. Operating on a wide 3.6V–30V DC input range, it draws less than 65µA in standby mode, making it ideal for battery-powered projects. Fully compatible with Arduino, Raspberry Pi, and other microcontrollers, this module features a stable green PCB with clear labeling and standard 3-pin header for effortless integration. Designed for durability and consistent performance, it operates reliably in temperatures from -15°C to +70°C.

• Detects human motion up to 7 meters away with 110° coverage using a built-in Fresnel lens for enhanced accuracy and range
• Adjustable sensitivity and delay time via onboard potentiometers—customize response for indoor lighting, security alarms, or automated systems
• Low-power design consumes under 65µA in standby mode, perfect for battery-operated IoT devices and energy-efficient installations
• Compatible with Arduino, Raspberry Pi, and 5V logic systems—directly connects to digital pins with no external circuitry required
• Robust green PCB with stable output and wide operating voltage (3.6V–30V DC), suitable for both prototyping and permanent installations