FREEZEmarker C

The FREEZEmarker® C is a single-use indicator that provides an easy-to-read visual signal when there has been exposure to a freezing temperature for a short period of time, for example, during shipping.

When the indicator temperature remains at or above -4°C, the green circle with a white checkmark inside the circle is visible in the Active Zone (Fig. 1).

When exposed to temperatures at and below -8°C, the green circle with a white checkmark inside the circle will partially or completely change to white opaque/cloudy, showing that a temperature excursion has occurred, and the endpoint has been reached (Fig. 1). If uncertain whether endpoint has been reached, press the circle with your fingertips to evenly distribute the white particles.


  • Response Temperature
  • Response Time
    30 minutes
  • Accuracy
    +/- 2°C
  • Shelf Life
    4 years
  • Size
    29 x 20 mm
  • Application

    Placed on product or product unit box. Pressure-sensitive adhesive, for flat surface applications.

The FREEZEmarker C is intended to monitor Freeze Events, not product quality. Response Time is the time below the lower temperature limit; the lower temperature limit is the response temperature minus the accuracy, e.g. 0°C ±1°C has an lower limit of tolerance of 0 – 1, or -1°C.

For additional product information or to place an order:

Contact Us