Use a PIR Sensor to detect the movements of a paper I need to detect when a paper comes out from a laser printer and count the number of printed papers. For that I hope to use a PIR sensor to detect the movement of the paper from the printer. Is it possible to detect the movement of a paper using a PIR sensor? Please be kind enough to help me.
If the paper is hot when it comes out of the printer, possibly.  Could be unreliable though.

Better would be to place a photo-interrupter (or IR LED and IR Photodiode) in the path of the paper to detect a break in an infra-red beam.