electronics in hot environments?

I want to build a data logger, able to withstand high temperatures for a short time. It should survive temps above 280c or 530f for a period of 3-4 minutes. I would like to use it every day to measure/control a reflow oven at work and it should at least live 1-3 years. What materials would you use as enclosure ? Why inside ? I need to check the controls/sensors of reflow oven, solder wave and need to mimic the process of actually soldering. Extrapolating data from sensors, used to set the machine, doesn't give real-time accurate data. It takes ages to tune the process just using the internal sensors. Machines are also 14-18 ft long, PCBs travel through them in one direction only, so I can't use a sensor board attached to a wire.

Asked By: Bart D - 4/24/2010
Best Answer - Chosen by Asker
I'd try to tap into the oven's own temperature control circuit to get a reading or permanently fix a thermocouple in there with wires leading outside. That's existing technology... More
Answered By: Jan - 4/24/2010
Additional Answers (1)
This is close or above the limit for most electronics, and batteries will not work. Your only chance is to insulate it well enough so that the interior stays cool for the 4 minutes. But why try to put it inside? Just put the thermocouple inside and the electronics outside. .
Answered By: billrussell42 - 4/24/2010
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