# Source: https://learn.adafruit.com/pir-passive-infrared-proximity-motion-sensor/buy-a-pir-motion-sensor.md

# PIR Motion Sensor

## Buy a PIR Motion Sensor

- [Previous Page](https://learn.adafruit.com/pir-passive-infrared-proximity-motion-sensor/example-projects.md)

## Primary Products

### PIR (motion) sensor

[PIR (motion) sensor](https://www.adafruit.com/product/189)
PIR sensors are used to detect motion from pets/humanoids from about 20 feet away (possibly works on zombies, not guaranteed). This one has an adjustable delay before firing (approx 2-4 seconds), adjustable sensitivity **and** we include a 1 foot (30 cm) cable with a socket so you...

In Stock
[Buy Now](https://www.adafruit.com/product/189)
[Related Guides to the Product](https://learn.adafruit.com/products/189/guides)

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