KenK wrote:
I just bought a new Accurite indoor/outdoor thermometer to try to get
accurate readings. It differed by 2 deg at about 40 this morning with a few
year old identical thermo. Yesterday I put those two, an ancient home
thermo and a refrigerator thermo (all I had) side by side at about 70. The
readings varied from 67 to 74. Is this about par for the course? I'd really
like to find one I can believe. I've had bad luck with Accurite digitsl
thermos and wind indicators in the past so didn't try another one.

Sugestions or is it hopeless to expect more than 2 to 3% accuracy? Or
perhaps I shouldn't care?

I like accuracy too. Never figured ou how to cal both my remotes. One often
goes way off. As said, testing devices is tricky. You need at least one
accurate one. High wind speed is needed to offset other factors. I often
measured temps at work for lab equipment. Other probes required fast flow
water baths. It came to being a radio shack wired remote was very accurate
to one degree, became one reference. I have had obtained good accuracy
with IR devices, both Harbor Freight and Fluke. I found the fluke is only
accurate when the device itself is about room temperature. Even got
variation with mercury lab thermometers. Average out your readings with at
least 3 devices. Even a cheap hvac thermostat could be used as another
reference, but I have had to cal those, as some are able to be set.

Greg