The serial number on most Comark Products is usually the date of manufacture followed by a unique product number.
For example, 02121234 is (02) for February, (12) for year 2012, and (1234) is the number of the individual product.
This works for all C series Thermometers, Evt2 and N2000 Data Loggers, RF51X Transmitters, KM2xx, P250FW, BT250 etc.
Warranty on most Comark Thermometers is 1 year. However, in reality Comark will give a little over the relevant warranty period to allow for distributor stock.