HC-SR501 PIR Motion Sensor (Passive Infrared Sensor)


SS-101A PIR sensor


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.


Voltage 4.8V – 20V
static current <50 uA
TTL output 3.3V / 0V
Delay time 0.3S – 200S, custom up to 10M
Lock time 2.5S Default
Trigger methods L – disable repeat trigger, H enable repeat trigger
Sensing range less than 120 degree, within 7 meters
Temperature – 15 ~ +70
Dimension 32*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.

Buck order price is 17% off  for more than 100pcs order, price auto update in the cart page.

Additional information

Weight 0.01 kg

13 reviews for HC-SR501 PIR Motion Sensor (Passive Infrared Sensor)

  1. 5 out of 5

    remymorra (verified owner)

    Very useful product, easy to use, does not require any special capability, very good mark 😀

  2. 5 out of 5

    schnetzi (verified owner)

    First, I had some troubles reading the right values. But after adjusting the photosensitive and temperature compensation controls it worked perfectly 🙂

  3. 5 out of 5

    balaji (verified owner)

    Seems perfect. Just use any arduino available sketch for this PIR. Works very well.

  4. 5 out of 5

    yfands (verified owner)

    The description says it all, very good product and affordable.
    If you want a good and reliable proximity sensor, buy this.

  5. 5 out of 5

    Elad (verified owner)

    Good build quality and nice design!

  6. 5 out of 5

    zemlin (verified owner)

    As everybody says this is a great Device. I’m using it for building my DIY alarm system and plan on using for Home Automation

  7. 2 out of 5


    how to drive relay from hcSr501

  8. 5 out of 5

    reedv (verified owner)

    I have purchased and used many of these. I usually combine them with relays to make motion-sensing room light switches. They have been robust, reliable, and sensitive. I recommend them highly.

  9. 5 out of 5

    Joe (verified owner)

    Works far better than i thought possible. Flawless.

  10. 5 out of 5

    cbbxl (verified owner)

    They work great. I’m using 16 of them, directly on 12V to trigger logic MOSFETs, on autonomous installations (without Arduino or board)
    Con: TTL output do not drive enough current to directly trigger some 12V relays, that’s why I’m using logic level MOSFET transistors (ex: MTP3055VL), which are finally more elegant than relays for DC current.

  11. 5 out of 5

    cromdeveloper (verified owner)

    Very good product!!

  12. 5 out of 5

    geraldhasmail (verified owner)

    I’m using these with Arduinos for security devices, and they have all worked quite well.

  13. 5 out of 5

    diazfjg (verified owner)

    Easy to use and good quality.

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