Howdy sous vide bros! A friend had us over for dinner a couple of months ago and got me hooked, so I put my starter setup together. First cook went pretty well, a couple of ribeyes, but then the next two sure seemed undercooked. This morning I thought, oh wait I own tools! In the first 1/2 hour or so the temperature was pretty accurate, then about 2 hours in I took the photo. 5 degrees below the readout. Sheesh. 🙄
I guess I will adjust by adding 5 degrees from now on, but just wanted to share my experience. Has anyone else gone through something similar?
by WhisperToARiot
13 Comments
I have the Instant Pot sous vide stick. It was $80 and is within a degree of the temp on the readout.
I’ve seen them off…but 5 degrees? I’d send that shit back. My inkbird is off like half a degree and that’s enough to annoy me..
Mine is about 2⁰ out and I just adjust my temp accordingly
Is that thermocouple touching the bottom of the pan? That would explain the discrepancy
If you want to check calibration you should do an ice bath, or boiling water. There could be that much difference in temperature between the two spots its measured. Resting the probe on the bottom certainly would cause a temperature difference.
Fluke > Klein
well, is your MM is calibrated? Factory calibration is only valid for 1-year & is only accurate anyway +/- 2% or +/- 9F
[Source: Klein MM600 Manual](https://data.kleintools.com/sites/all/product_assets/documents/instructions/klein/MM600_1390111ART_WEB.pdf)
I mean, theoretically you need another thermometer to confirm which is right.
I mean the same could be said about that multimeter.
I use my meat probe thermometer to test mine. It’s pretty accurate. To 1° or 2°.
I have a sans air that’s over 10 years old and it’s still within a 10th of a degree. However, that tool multimeter you have is cool.
Yeah. Might be time to splurge on a new multimeter.
Your seeming to have a fundamental disconnect on ranging, accuracy, and thermocouple function.
Your Klein is rated to measure between -18° to 538°C, the whole spectrum, as accurately as possible, total 556 degree of spread- as such it can be off by as much as 10 degrees (2% of spread)
Your SV has been hard calibrated (once) to measure between 43 and 90. (47 degree of spread).
Your Klein has had to make approximations for thermocouple voltage -> measured temperature a literal order of magnitude lager.
The SV is probably not as accurate as your Klein, but its spread is significantly smaller, so a much more forgiving accuracy will end up being more accurate (for its narrow spread), however given the accuracy that people are looking for with SV cooking, being off by half a degree CAN be of concern- which is why calibration checks happen.
There have been SV units which are off; some significantly so, but the first step to determining if this is the case is to start with a precisely calibrated tool built for the temperature range in question.