Larry,
They work by emitting a beam of infrared light and then sensing how much is
reflected back. A warm body reflects far more IR light than the air and the
light turns on even if the air is close to skin temperature.
Rick
----- Original Message -----
From: "Larry Daniels" <ladaniels@sbcglobal.net>
To: "Rick Fisk" <refisk@chartermi.net>; <spridgets@autox.team.net>
Sent: Thursday, February 17, 2011 10:13 PM
Subject: Re: [Spridgets] (no subject)
> Rick, not trying to be a smartass here (I don't really need to try), but
> if
> the motion detector is actually a temperature sensor, would it detect a
> body
> when the ambient temperature is about 98.6 degrees? Seems like it would
> fail as it neared that temp.
>
> LAD
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