| 摘要 |
<p>The present invention concerns a device for monitoring the temperature of items such as food products, blood products, tissue cells etc. This device comprises a medium that changes its physical state from one phase to a second phase, for example, from solid to liquid, at a critical temperature. These changes in phases cause an irreversible change in a detectable parameter, which permits the detection of a change in the temperature during the handling of the monitored item.</p> |
