Thanks for the input. Well, what I need is to measure an iron (200-250 C),
to measure the temperature of my battery, motor and other stuff just to make
sure they are operated at the right way or under the specifications or
whatever. I also was thinking of using such a device if I decide to try out
that home brew smd soldering stuff mentioned here in another topic.

Actually just bought a cheap one to play and make some experience with it.
It says it goes up to 280 C. It seems I could not measure shiny surfaces (as
mentioned by Herbert) and also I have a hot air blow tool but when it is
operated (so the air is moving out from it) this device measures only 42 C,
however, when I switch it off it measures the correct (or I believe the
correct) temperature.

Still in question what about my outrunner motor, where the surface I would
like to measure continuously rotating and obviously the air around moving?
And also in question if I'd like to measure the temp of my two stroke engine
which is vibrating a lot (and also the air screw makes a huge air movement)?
If this type of measurement does not work for those, what other type can I
use?

Thanks again answering to my stupid questions :-)
Tamas



On 1/24/07, Vasile Surducan <piclist9@gmail.com> wrote:
>
> On 1/23/07, Tamas Rudnai <tamas.rudnai@gmail.com> wrote:
> > Is anybody knows the accuracy of these devices? OK, each says around 1-2
>
> Usually I'll say "In your dreams". But because I know you a little
> bit, you deserve a detailed answer.  If you'll measure a red iron
> surface comming from a furnance, having say 1800C, how much will means
> 1-2C as a procentual error ?
> Does the iron has exactly the same colour over it's surface ?
> If you're measuring 200C of a hot plate  what does it means 1-2C ?
> But if you're measuring a cold cup of water (having say 15C) when the
> ambiant temperature is +30C, what does it mean 1-2C ?
>
> I think you've got the essence.
> greetings,
> Vasile
>
> P.S. Do not believe any infrared thermometer builder specifications
> (without understanding how was specified) even if it's Raytek or other
> great name.
>
>
> > Celsius, however, I am not sure if that is true for all type of
> surfaces?
> > Also how the accuracy affected by wind, humidity and vibration?
> >
> > Thanks,
> > Tamas
> >
> >
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