3M™ Freeze Watch™ Indicator 9800FW consists of a highly sensitive indicating liquid inside a specially designed ampoule to monitor exposure of temperature-sensitive products to freezing temperatures.
The ampoule fractures when exposed to temperatures equal to or below -4°C/25°F, irreversibly staining the paper behind to indicate the product has been exposed to unacceptable temperatures. When placed directly on secondary shipper boxes of temperature-sensitive products during shipment and storage, the 3M™ Freeze Watch™ Indicator 9800FW provides a reliable measure of temperature exposure. Pressure-sensitive adhesive sticks to almost all clean, dry surfaces for a strong bond that securely holds the indicator in place throughout the shipping process. These indicators are ideal for monitoring products that are susceptible to damage when exposed to freezing temperatures during shipment and storage. Despite the best efforts to properly package, certify, and ship freeze-sensitive commodities, there are no guarantees that a product will make it through the shipping system intact. When a package is delivered physically intact, there is still no way to know if the contents were subjected to freezing conditions. When all packaging requirements have been followed and precautions observed, 3M™ Freeze Watch™ Indicators add a critical layer of content security by providing a noticeable indication that the package and contents were exposed to freezing temperatures. This inexpensive indicator affixed to the outside of the container helps the shipping company quickly identify and handle the package in accordance with special shipping instructions. Should the package undergo freezing conditions, the visual indicator clearly alerts the recipient that the contents may be damaged despite the physical condition of the package.