I am looking at putting in digital room temperature sensors/monitors that record temps to the cloud for monitoring and alarm notifications, note; my room temperatures are my CCP's, we are a fresh meat operation. The sensors I am looking at installing come with a NIST calibration record that is good for a year. Each new calibration will cost $165 per sensor which is a deterrent to weekly or even monthly calibrations, in addition they need to be sent out to a calibration lab. Currently I calibrate digital stick thermometers that are used in the rooms weekly. I have yet to find where a digital stick thermometer is off by more that .7 degrees F. in years of calibrating digital thermometers, either they work or they don't. Is it possible to write a calibration program to calibrate a digital thermometer annually providing it is calibrated to NIST standards at an outside lab and use the NIST calibration documentation as record?
Thank you