[Phys-L] Re: Laser Temperature Gun

[jbellina <jbellina@SAINTMARYS.EDU>]

I suspect the laser just aims the device.  What is being sensed is
the ir radiation...it is a commonly used thermal sensor.

joe

Joseph J. Bellina, Jr. Ph.D.
Professor of Physics
Saint Mary's College
Notre Dame, IN 46556

On Nov 4, 2005, at 11:31 AM, Ron Curtin wrote:

> One of the janitor people came by my room with a new
> temperature-measuring device that I liked, but can't figure out.
> It is
> a gun shaped thing that "shoots" a laser beam at a vent in the
> ceiling.
> The device has a digital readout of the temperature of the spot the
> laser is hitting.  It seemed to work. The temperature of the air
> output
> was 85 degrees and the temperature of the return air was 70 degrees.
> Does anyone out there know how this could operate?   Thanks.
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