HC-SR501 motion sensor detection range and false triggers

TECHNICAL SUPPORT Sensors & Modules
1

Customer:

I’m interested in the HC-SR501 motion sensor. The description states it can detect motion up to 7 m away. At what distance could it detect, for example, a cat in a garden, and does it give false alarms if wind moves branches or rain falls?

Original message (Croatian)

Zainteresiran sam za Senzor pokreta HC-SR501.

U opisu stoji da osjeća pokret na udaljenosti do

7 m. Na kojoj udaljenosti u može npr. u vrtu osjetiti

mačku i da li daje lažnu dojavu, ako vjetar giba granje

ili pada kiša.

Originally submitted via email support on 1 June 2017. Migrated to the forum for community visibility.

2

Soldered Support:

The HC-SR501, like other infrared sensors, distinguishes obstacles that emit heat (such as a cat, a human, etc.) from others. You can read more here: https://e-radionica.com/hr/blog/2015/08/19/kkm-hc-sr501/

Original message (Croatian)

HC-SR501, kao i ostali IC senzori, razlikuje prepreke koje zrače toplinu (kao mačka, čovjek i sl.) od ostalih. Više pročitajte ovdje: https://e-radionica.com/hr/blog/2015/08/19/kkm-hc-sr501/