The PIRs found inside of the cheap motion detectors (*) are tuned to
human heat signature, so most sensible for human movement than other
heat sources.

The Sensors found at the Non-Contact-Pyrometers embrace a wide range of
infra-red and they are more "linear" then the cheap from motion
detectors, and more expensive too.  Non contact pyrometers use a set of
lenses to focus a narrow angle up front.

(*) $8.00 at Home Depot, Lowes, Wal-Mart, and others, with all the
electronics, lamp sockets and more... I can't believe how can they do
it.

Wagner.


Sean Breheny wrote:
>
> I have two related questions:
>
> #1) Where can one get these PIR detectors?
>
> #2) Are these similar to the sensors used in the non-contact thermometers?
> If not, what kind of sensors are usually used there?
>
> Thanks,