[DeTomaso] ceramic coat vs. wrap

[JDeRyke at aol.com]

In a message dated 4/11/08 8:36:33 AM, msm at portata.com writes:

> >> I have noticed that my IR-temp gun reads significantly lower temps on 
> shiny metal parts than if they are dull>>.
> 
> That is a known problem with the IR-temp sensors.  Don't use them on your 
> bling-bling parts.
> 

True. Besides having to guess at an emissivity factor for the guns on shiny 
stuff, another thing to consider is, most IR guns have a fairly large spot they 
detect, and if you're only a few thousandths off on your target, the results 
can be hundreds of degrees apart on successive shots on the same pipe. I found 
it to be close-to-useless as a temp gauge on headers. FWIW- J DeRyke



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