fromarParticipantMarch 15, 2012 at 8:21 pmPost count: 18
I bought a thermocouple from Amazon here: http://www.amazon.com/gp/product/B003V8BF2U/ref=oh_o01_s00_i00_details
I did not realize, but the tip of the thermocouple is not waterproof. Lucky for me, dipping it in water just causes the thermocouple to cease working. It didn’t get fried.
What are you guys doing to solve this? I have a couple of ideas:
- A bead of hot-glue at the end
- Vacuum seal the end
- A zippy bag
All of these methods have the problem of insulating the sensor – which means slower response time on the osPID measurements.BrettKeymasterMarch 16, 2012 at 11:26 amPost count: 101fromarParticipantMarch 16, 2012 at 2:19 pmPost count: 18
I tried saran wrap with a rubber band, but it leaked after a while.
In the end, I wrapped the thermocouple in a condom, and even when things got hot, nothing leaked. 😀BrettKeymasterMarch 16, 2012 at 3:19 pmPost count: 101
I wrapped the thermocouple in a condom
that is, without a doubt, the funniest thing I’ve heard all week. love the idea though. a balloon would probably work as well. nice thin layer, water pressure presses it up to the element… nice work!ezflyrParticipantMarch 17, 2012 at 1:43 pmPost count: 5
An interesting question would be why immersion in water causes the thermocouple to stop working? Obviously, the Maxim part doesn’t provide an “isolated” input, but that shouldn’t matter in this situation. It seems that a current flow path would have to exist for the thermocouple to stop working? I’m trying to imagine another explanation to this issue? What happens if the water is isolated rather than the probe?
PS it seems that my kit has been delivered, but I won’t get to play with it until I return from skiing in California next weekend.FJKParticipantMarch 17, 2012 at 10:25 pmPost count: 2
Tcs do generate a miliamp current that a meter would pick up and convert into a temp measurement. Do a search on Immersion Thermocouples, a lot of different kinds out there… 🙂
Just some TC info…AustralianRoboticsParticipantMarch 27, 2012 at 3:58 amPost count: 11
I am using this for my sous vide cooker:AustralianRoboticsParticipantMarch 27, 2012 at 4:48 amPost count: 11
Here’s a real liquid probe:
Also available on eBay from a few Hong Kong sellers for less.
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