[Phys-L] Re: Laser Temperature Gun

[Bernard Cleyet <anngeorg@PACBELL.NET>]

Still available from COSTCO. A less (much) expensive version is
available from Radio Shack (R/S).  No laser pointer and more limited
temp range.  However, so inexpensive I've bought one for the sensor
similar to the ones PASCO sells.  One can buy the sensors for OEM
(original equipment mfg..) use.  They are semiconductor thermocouple
piles.  Case is argon? filled.

bc, from memory a year ago.

jbellina wrote:

> 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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