IR Gun (was Favorite tool) [RE-wrenches]

[Peter Parrish]

Not I. 
- Peter

-----Original Message-----
From: Bill Loesch, Saint Louis Solar [mailto:bill_loesch at compuserve.com] 
Sent: Tuesday, May 09, 2006 1:19 AM
To: INTERNET:RE-wrenches at topica.com
Subject: RE: IR Gun (was Favorite tool) [RE-wrenches]

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Thanks to both Peter and Phil for the background and technique.

Any suggestion for a "tape" on a polished stainless exhaust pipe that
approaches 500 oF?

Bill Loesch
Solar 1- Saint Louis Solar
314 631 1094


Message text written by INTERNET:RE-wrenches at topica.com
>
IR guns indeed will not provide accurate info when measuring a shiny
object.
However, put a piece of tape on the shiny object, and they will read
accurately.  Seems silly, but it works.

Please note new phone extensions
 
---------------------------------------------------------
Phil Undercuffler
Technical Service Manger, ext. 0741
Conergy, Inc.
1730 Camino Carlos Rey Suite 103
Santa Fe NM  87507 USA
Tel 505-473-3800 ext 0741
Fax 505-473-2134
www.conergy.us
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-----Original Message-----
From: Peter Parrish [mailto:peter.parrish at calsolareng.com] 


Second, IR gun should be used with some caution. They read the emitted
radiation from a surface (which under the conditions that we are talking
about, is proportional to temperature), BUT the IR emissivity of materials
differ. I would not trust an IR gun reading the temperature of a shiny
metal
surface (e.g. gas heater vent, bright copper plumbing). On the other hand,
glass, water, and many paints are at or near 100% emissivity.

- Peter Parrish

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