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View Full Version : Pipe temp vs. fluid temp / Thermocouple install







pjauff
12-03-2008, 04:58 AM
Hello,

Suppose if I were to measure outside surface pipe temperatures with a contact thermocouple (wrapped in duct tape or something), how accurate would this be in a 1/4" copper pipe? I'm trying to save some time for my degree project and was wondering if this is a viable option.

If not, does anyone have an idea how to get a thermocouple inside of a pipe cheaply? I was originally going to use these special NPT pipe thermocouples but they were too expensive

Regards,

Patrick

nike123
12-03-2008, 07:48 AM
http://tinyurl.com/2zxyek

TRASH101
12-03-2008, 04:14 PM
if using contact thermocouple then try using heat sink paste this will improve both response and accuracy. If you need to prove accuracy then I suggest mapping your thermocouple to known temperatures.

pjauff
12-03-2008, 08:54 PM
Thanks for your responses, I'm going to try the heat sink paste.

How would I go about mapping the thermocouple to a known temp? I'm unfamiliar with this.

Brian_UK
12-03-2008, 09:38 PM
Start with boiling water, 100C, 212F and melting ice 0C, 32F.

Calibrate your sensors/thermometer to those two temperatures and you should be OK.