Electronic time-temperature indicator and logger

Abstract From the Canadian patent

This invention covers improved electronic time-temperature indicators (10) with a visual output (4), and other devices and methods by which the thermal (2) history of a complex material, which may not obey a simple exponential Arrhenius law degradation equation, may be monitored and the subsequent , fitness for use of the tracked material may be quickly ascertained. In particular, the invention discloses a rapidly reprogrammable electronic timetemperature tag (1) that may be easily customized with the thermal timetemperature stability profile on an arbitrary material using electronic data , transfer methods. Using this device a single, low-cost, generic time-, temperature tag may be …