Pir Sensor

A Passive Infrared (PIR) sensor detects motion by measuring changes in infrared radiation emitted by surrounding objects, particularly human bodies. It works without emitting any signal—passively sensing heat differences when a person or animal passes within its range.

• Key Features:

  • Detects human/animal movement within a set range (usually 3–7 meters)

  • Low power consumption

  • Adjustable sensitivity and delay time (on most modules)

  • Simple digital output for easy microcontroller integration

  • Ideal for security alarms, automatic lighting, and motion-triggered devices

    

    Parameter	Specification
    Operating Voltage	4.5V – 20V DC
    Quiescent Current	< 50 µA
    Detection Range	3 – 7 meters (adjustable)
    Detection Angle	~120°
    Trigger Modes	Repeatable (H) / Non-repeatable (L)
    Delay Time	5 seconds – 5 minutes (adjustable)
    Output Voltage	High: 3.3V, Low: 0V
    Sensor Type	Dual-element pyroelectric
    Operating Temperature	–15°C to +70°C
    Dimensions	~32mm x 24mm
    Interface	3-pin (VCC, OUT, GND)
    Lens Type	Fresnel lens

Specifications:
Product Type: HC–SR501 Body Sensor Module
Operating voltage range: DC 4.5-20V
Quiescent Current: <50uA Trigger: L can not be repeated trigger/H can be repeated trigger(Default repeated trigger)
Delay time: 5-200S(adjustable) the range is (0.xx second to tens of second)
Block time: 2.5S(default)Can be made a range(0.xx to tens of seconds)
Board Dimensions: 32mm*24mm
Angle Sensor: <100 ° cone angle Lens size sensor: Diameter:23mm(Default)

Applications:
Security Products
the human body sensors toys
the human body sensor lighting industrial automation and control, etc