The device indicates via a visual alarm when an exposure to temperatures below -0.5°C for longer than 60 minutes has occurred.
The Freeze-tag is an electronic Irreversible Freeze Indicator (IFI) with an internal sensor, factory-programmed alarm and visual display for indicating a freeze event during transport or storage of freeze-sensitive vaccines.
The device is shipped activated from the manufacturer and once an alarm has been triggered, cannot be re-used.
