HC-SR501 PIR Motion Sensor (Passive Infrared Sensor) 02
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HC-SR501 PIR Motion Sensor (Passive Infrared Sensor)

4.70 out of 5 based on 10 customer ratings
(10 customer reviews)


SS-101A PIR sensor

SKU: 3204585. Category: . Tags: , , .

Product Description

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.


  • Use BISS0001 signal processing IC, sanyo genius regulator
  • Voltage: 5V – 20V
  • Power Consumption: 65mA
  • TTL output: 3.3V, 0V
  • Delay time: adjustable (0.3 sec – 10 minutes)
  • Lock time: 0.2 sec
  • 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, distance between screw 28mm, M2, Lens dimension in diameter: 23mm


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.


  • Adjust the distance: turn the potentiometer clockwise rotation, increased sensing distance (about 7 meters), on the contrary, the sensing distance decreases (about 3 meters).
  • Adjust the delay: turn the potentiometer clockwise rotation sensor the delay lengthened (600S, 10 minutes ), on the contrary, shorten the induction delay (0.3 second).


Additional Information

Weight 0.01 kg

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

  1. 5 out of 5

    (verified owner):

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

  2. 5 out of 5

    (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

    (verified owner):

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

  4. 5 out of 5

    (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

    (verified owner):

    Good build quality and nice design!

  6. 5 out of 5

    (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

    (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

    (verified owner):

    Works far better than i thought possible. Flawless.

  10. 5 out of 5

    (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.

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