Digital Temp Calibration

[snowmansnow]

I'm looking for a very accurate thermometer I can use to calibrate my temp probe. Anyone have a suggestion? Thanks.
B

 

[FutureInterest]

Honestly, I just use the same type of old school under the tongue thermometer for this purpose. If its good enough for me... it should be good enough for the reef tank

 

[bcavalli]

Harbor Freight has really inexpensive and accurate digital thermometers. I’ve used mine for years.

 

[Adam]

I use one of these $26 thermometers.