- Enclose the Freeze-tag with the products that should be monitored.
- Before reading, the Freeze-tag shall be placed in an environment above freezing temperature for at least 2 minutes.
- Observe the Freeze-tag and note which sign is shown on the display:
OK display | Your product has not been exposed for more than 60 minutes to freezing temperatures. | |
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ALARM display | Your product has been exposed for more than 60 minutes to freezing temperatures. The ALARM sign is irreversible! |
If the display remains blank, expose the Freeze-tag again at room temperature and wait at least 2 minutes. If the display is still blank, please check the expiry date (see this chapter).