Like @krakert said, that is a good choice, search for PIR sensor on your favorite retailer's site. The model he's shown has a better range than the smaller models.
How many entrances does the room have?
What are the dimensions of the room?
Like @krakert said, that is a good choice, search for PIR sensor on your favorite retailer's site. The model he's shown has a better range than the smaller models.
How many entrances does the room have?
What are the dimensions of the room?