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How can I keep my samples cool on the benchtop?

The Isofreeze® colour changing racks available form Camlab are manufactured with a gel-filled center section that uses temperature-dependent color-change material, green to yellow or purple to pink.

There is a dramatic change to a contrasting color at 7°C, so you can use this indicator to determine when the temperature of the rack, or even a single well, is rising to above standard refrigeration temperature. Each rack comes with an individual snap-on lid made of clear polypropylene.


  • Maintain a sub 4°C (refrigerator) environment for up to 4 hours.
  • Ideal for PCR reagents, cells, enzymes, or other temperature-sensitive reagents.
  • Fits standard format 0.2ml tube, strip tubes, 0.5ml-2.0ml eppendorf tubes and any format of PCR plate (up to 96 wells) for PCR, QPCR, or other applications.


 The design provides a more compact option for crowded benchtops or freezers.

For more information about these racks click ISOFREEZE or call 01954 233110 to speak to a member of our team