HC-SR501 Motion Sensor – Detect Humans with PIR Technology for Security and Automation

Adjustable Module with Range up to 7 Meters for Alarms, Lighting and Smart Systems

The HC-SR501 is a pyroelectric infrared (PIR) sensor module designed to detect the motion of heat sources, most commonly people or animals. It works by sensing changes in infrared radiation within its field of view, making it ideal for security systems, automatic lighting, energy-saving systems, and smart home devices. The module offers two main adjustments: sensitivity (range) and time delay (how long to maintain the output signal after activation). With an operating voltage of 5V-20V (most commonly 5V is used) and a digital output (HIGH on motion), it is easy to integrate with microcontrollers such as Arduino, Raspberry Pi, or directly with relays.

Operating Voltage: DC 5V-20V
Static power consumption: 65 microamps
Level Output: High 3.3V , Low 0V
Delay time:Adjustable (0.3 seconds to 10 minutes)
Blocking time: 0.2 seconds 
Trigger: L can not be repeated, H can be repeated, the default value is H
Induction Range: Cone angle of less than 120 degrees, less than 7 meters
Working temperature: -15℃-70℃

Application:

Automatic lighting hallways, corridors, bathrooms, basements, warehouses, garages, and other places, automatic ventilation exhaust fan and other electrical appliances (incandescent, fluorescent, buzzer, automatic doors, electric fans, dryers and automatic washing machine) especially for use in businesses, hotels, shopping malls, warehouses, sensitive areas or security zones and alarm systems. Can also be used for security purposes