ISO digital thermometer that accepts multiple thermocouple types
August 27, 2020 9:49 AM   Subscribe

Looking for a digital thermometer that would accept at least Type K and Type T thermocouples. Not having much luck finding one that costs circa $150 or less and isn't inaccurate junk, but not sure I know where to look.

Thermoworks is my usual go-to for this sort of thing, but they don't seem to offer any units that take more than one thermocouple type.
posted by slkinsey to Technology (8 answers total)
Best answer: Type T is a big stretch for a consumer thermometer. But I think Omega might have the best shot at what you want, like their HH508/HH509 or HH25U.
posted by JoeZydeco at 10:27 AM on August 27, 2020

Best answer: The Lascar will do that, mine doesn't have the LCD, but I bet you could use the LCD and ignore the logger if that was your jam. You'd have to restart logging each time you switch b/w TC type. We own the EL-USB-TC which has been good enough for logging heaters in the RT to 400C range.
posted by Dmenet at 10:37 AM on August 27, 2020

Response by poster: Type T is a big stretch for a consumer thermometer.

Yeah. The only reason I'm not looking at Type K only is that I'm thinking of getting a Scace device, and those seem to be Type T.
posted by slkinsey at 11:17 AM on August 27, 2020

Your DIY option is to get a Raspberry Pi and the MCC 134, which feels like overkill but gets you close on price
posted by Dmenet at 1:21 PM on August 27, 2020

Are you looking for a computer interface to the thermometer?
posted by JoeZydeco at 1:40 PM on August 27, 2020

As an aside, I'd love to hear why they use a T type instead of K on a scace - I'm guessing it's force of habit...
posted by Dmenet at 3:00 PM on August 27, 2020

Response by poster: Dmenet: Type T has a faster response, which it important in the context of temperatures that are changing dynamically over the course of only 30 seconds or so.
posted by slkinsey at 4:38 PM on August 27, 2020

It looks like T-type lists higher accuracy reporting temperature. From here I see +/- 2.2C or +/- .75% for K-type and +/- 1.0C or +/- .75% for T-Type. I believe that response time is dominated by TC wire thickness and exposure to material being tested. This shows effectively instant (0.003s) response time to a bare 0.001" TC wire.
posted by Dmenet at 9:29 AM on August 29, 2020

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