cassharper;1770864; said:Digital thermometers need to be calibrated every few months, or else the probe might need to be changed. It's different for all different kinds so check the instructions that came with it.
its all about price..........
you can buy a 1ppm ( parts per million) thermometer from Hart Scientific fro $25000. digital
any digital under $100 is suspect beyond plus minus 1 or 2 degrees
see my prior post (#6) for the most cost effective log term solution
or you can send them to www.ptcmetrology.com for a NIST traceable certification
