PIR Motion Sensor (Passive Infrared Sensor)


A motion sensor for human body detection

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HC-SR501 is based on infrared technology, automatic control module, using Germany imported LHI778 probe design, high sensitivity, high reliability, ultra-low-voltage operating mode, widely used in various auto-sensing electrical equipment, especially for battery-powered automatic controlled products.


Voltage4.8V – 20V
static current<50 uA
TTL output3.3V / 0V
Delay time0.3S – 200S, custom up to 10M
Lock time2.5S Default
Trigger methodsL – disable repeat trigger, H enable repeat trigger
Sensing rangeless than 120 degree, within 7 meters
Temperature– 15 ~ +70
Dimension32*24 mm

screw-screw 28mm, M2

Lens diameter: 23mm

  • Use BISS0001 signal processing IC, sanyo genius regulator


Automatically sensing light for Floor, bathroom, basement, porch, warehouse, Garage, etc, ventilator, alarm, etc.


  • Automatic detecting: the output will be high when objects enter the sensing range, and automatically turn to low when object leave
  • Photosensitive control (optional, not factory-set yet) can be set.
  • Temperature compensation (optional, factory reset): In the summer when the ambient temperature rises to 30 ° C to 32 ° C, the detection distance is slightly shorter, temperature compensation can be used for performance compensation.
  • Working mode (set by jumper)
    • Non-repeatable trigger/ delay mode (set to LOW): the sensor will turn to low TTL after the delay, even the sensing object is still in range.
    • Repeatable trigger (set to HIGH): the sensor will not turn to low if the object still staty in the sensing range in the delay time.
  • Wide operating voltage range: default voltage DC4.5V-20V.
  • Micro-amp power level consumption: static current <50 microamps, particularly suitable for battery-powered automatic control products.
  • Output high signal: easy to achieve docking with the various types of circuit.

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