I have a project where I need to install an Arduino inside an oven where the temperature will get up to 300 degrees Celsius or 570 degrees Fahrenheit.
Crazy temps I know. The plan I have is to program the Arduino and then encase it in high temperature epoxy, I've found some that will supposedly handle the temperature I was just wondering if anyone had used this method successfully (or not). Another alternative is to house the Arduino inside an ice jacket which is how I've seen another similar system do it but you have to keep replacing the ice of course...
It would be exposed to the temp for about 15 minutes then cooled for 30 minutes, then heated for 15, then cooled, etc etc
Welcome peoples thoughts on this working, or not...
And it's thermally conductive, that goes both ways: heat transfer from the uC if ambient temp is cooler, and heat transfer To the uC if ambient temp is warmer.
Standard Arduino '328Ps are only rated to 85C.
I'm with DrD - keep your electronics outside, and thermocouple to the inside.
Are you trying to control active stuff in the chamber? Maybe run a cooling jacket around an encapsulated part, where you can pump coolant around the part.
Ages ago I've been checking on Aerogel, to insulate a datalogger to test the solderwave at my previous job. (didn't finish it since they rather had an external company testing it)
Heat resistance is amazing, there are enough youtube videos to prove it. Unfortunately it's quite brittle, but apparently something called Airloys is available now. It's still pretty expensive, but it wouldn't surprise me if it could keep the heat away for 30 minutes.
Thanks guys I'm rapidly coming to the conclusion that this is a no go.
I wanted to measure the internal temperature of a mould in an oven, it sits in a 2 axis gimbal so I'd need to use two slip rings to get the thermocouple out of the oven and the entire distance would be in excess of 5m from mould to outside.
This reminds me of a client who asked me to fix his digital movie camera.
Every part in there was burned or had exploded.
When I asked him what happened, he confessed that he wanted to know what was happening to the food inside his microwave.
Leo..
15 minutes would not be hard to do at all. theres a couple approaches you could take.
incase in a large thick metal case. basically use the large mass of metal to protect the arduino from the heat. if the metal is large enough it will take a long time to fully heat up. at work we have systems that take hours to get to thermal equilibrium.
use a ceramic case. ceramics dont tranfer heat well.
make a breadboard arduino(hackduino) same enough to fit inside a thermos. they are cheap. you can do it for like 8 dollars.
do 1 or 2 but use two walls so you have an air barrier. even better fill the gap with water. water/mineral oil. both take forever to warm up.
Hi,
Do you want to measure realtime or just log the temperature for later analysis.
If real time, how do you aim to transmit the data?
If the mould is metal you are not going to get any data transfer.
No Arduino involved, but quick and cheap. Google "high temperature crayons". You will find a lot of hits for companies manufacturing crayons that when a set of them is used to mark the inside of the mold, will give you an fairly accurate temperature. And they can be used over and over to make lines on the mold for future tests.
btw those temps are too crazy :). Im working a project now where we are flowing 1000C air. at those temps you have to use Inconel and that stuff is crazy expensive not to mention thermal expansion is crazy.
Hi,
I had to get zee grey cells working, I used to work in maintenance in a brickworks.
The kiln had thermocouples to measure and control the beast, but at times the QC department wanted the centre of a batch that passed through the kiln to be checked.
