Oren posted for all of us...



On Sun, 04 Feb 2018 11:51:08 -0500, "(PeteCresswell)"
wrote:

I've been trying to buy four refrigerator/freezer thermometers and it's
frustrating how inaccurate/inconsistent they are.

For Instance:

- 4 thermometers of same make/model, hanging on the same rack.

- Alcohol bulb/glass tube - you'd think basic physics...

- Each reads a different temp from 68 to 74 degrees.

Only thing I can think of is that the card behind the glass thingie is
misaligned, but looking at these things, there does not seem to be enough
physical room for those kinds of errors.

Also, at home I have a couple of digital indoor/outdoor thermometers.

Bring the outdoor sensor inside and put it right next to the master part, and
they're a couple degrees different.

Is there any hope at all of finding four thermometers which:

- All read the same temp when placed side-by-side
- Read the correct temp.

What am I missing?

Pete,

Maybe check here. I never knew so little until I bought a good unit
for my outdoor meat smokers and instant read (few seconds) units. It
can with a certificate of accuracy +/- .

I very much doubt cheap units can be calibrated.

"... Find info on instrumentation, sensors, measurement and control,
calibration and a variety of commercial applications."

https://www.thermoworks.com/learning-center

I liked the part about "The Importance of Probe Wipes"

--
Tekkie