I don't know if this is the right place to post but I think it should work 
My Arduino will be inclosed in a project box, measuring the temperature of a fire in a fire pit. It will be directly under the fire so i know it will probably get hot enough to melt the Arduino. What could I use to insulate the project box to keep the Arduino at a reasonable temperature?
Thanks!
How about this: Use a thermocouple (not a thermistor, because you likely won't be able to find one in the temperature range needed), and run the wire (properly heat-shielded - most come this way) from your measuring point out to the Arduino, which ideally should be placed far enough away from the heat source to not be damaged or otherwise affected by the extreme temperatures...?
That said - what made you think you had to put the entire Arduino underneath the fire?
$14 a piece:
@pito,
that's cool stuff !
where to buy?
I thought their was a limit to how long you could run a wire? Thats why I thought the Arduino had to be close by. Also, I think it would be easier to heat proof the project box then to try and heat proof the wire.
As rrobtillaart said where do you get those tiles?
Also,
If you can't get those tiles anymore does anybody ells have other ideas on how to heat proof the project box or the wire, if it can be run a few feat.
Thanks!
This just seems like a really bad idea, unless the idea is to turn your arduino into slag.
Perhaps something like this would work better:
Or an infared sensor?
@Rob:
"Authentic LI-900 Shuttle Tile Insulation" packages sold at the Kennedy Space Center Visitor Complex..
The souvenir insulation is produced by a third party (Aerospace Ceramics, Inc.) using the raw materials and processes used by Lockheed Space Operations.."
(originally the material we used to make our hats of..)
http://www.thespaceshop.com/shuttilin.html
Thanks for all the help! I will probably buy both the sensors and the heat shields just for fun!
Thanks!
Thermocouples are routinely used to measure temperatures high enough to melt ordinary plastic wire insulation. If you use a thermocouple, it will usually come with insulated wire with a high temperature rating. Just choose one with a long enough wire to reach between your fire pit and your Arduino. It should be no problem getting one to reach a couple of feet - I use longer ones than that to measure exhaust temperatures. Even a standard domestic oven thermometer would probably be enough for what you need.
The flame sensor can be used to detect fire or other wavelength at 760 nm ~ 1100 nm light.
To measure flame temperature.
i. optical pyrometer
ii. photocell/PbS pyrometer
iii. colorimetric pyrometer
You could use fiber optic cable to extend distance.