thermocoupler probe for liquid?

leifjl

leifjl

Joined
Nov 27, 2011
Messages
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I've just recently purchased a digital thermometer, with k type wire probes, to test my ovens accuracy and for hot and cold spots. I'd like to be able to check my dry ice/ alcohol temperature also but I am having difficulties finding a probe made for liquid that goes down to -100c.
I've read that you can just place the regular probes in something like a Ziploc bag and use them that way, but I'd prefer to use a made for liquid probe if I can.
If anyone has any suggestions at all I'd appreciate it.
Thanks, Leif
 
Get an ultra low temperature thermometer. I've seen them down to -130F. Don't know the cost but shouldn't be too costly as the ones I've seen are the old analog liquid type.
 
Generally speaking, most type K probes will be ok down to -100 degC or less, as long as they'll handle the thermal shock.

The cheapest probes are usually just an exposed, welded junction projecting from the end of either PVC or glassfiber insulation. These should be fine. Most Mineral Insulated probes should also be fine.

If you have a ceramic-sheathed probe for your oven, I'd definitely suggest you avoid using it in the cold liquid because it's quite unlikely it would survive the thermal shock.
 
Part of your problem might be if you're searching for "thermocoupler" instead of thermocouple.

Omega Engineering has a thermocouple for just about anything you can think of.

This one should work for what you're wanting to do-
KMQIN-125U-18

But they have a probe configuration tool on their site that let's you find exactly what you want/need. :)

http://www.omega.com/config/probeconfig_TC.html
 
Thanks for the quick replies.
I think I was searching thermocoupler, good catch. Omega's perfect.
Thanks again!
 
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