WarmMark Duo by Spotsee


  • Dual Threshold Time/Temperature indicator
  • Field-armable with pull tab

WarmMark Duo

The ShockWatch WarmMark® Duo is a cost-effective, disposable temperature indicator that monitors temperatures during shipping and storage, indicating whether goods have been subjected to unacceptable conditions. These reliable temperature indicators provide visual evidence of exposure to unacceptable temperature levels, allowing you to determine if product quality has been compromised. It is ideal for products with a known temperature stability curve and expiration characteristics at certain time and temperature combinations.

WarmMark Duo Indicates the duration of temperature exposure at two different activation temperature levels. If the windows in the WarmMark Duo indicator stay white, there’s no problem. But if the temperature climbs beyond two specific thresholds, a red color moves

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through the windows of the indicator with the passage of time. If the temperature returns to below the threshold, the color stops moving. In this way, handlers and shippers can know how long the product was exposed above the threshold temperature.

  • Monitor for the length of time above 10°C and for brief excursions above 34°C
  • Know if a product has been exposed past a threshold and check for high temperature spikes.

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  • Pharmaceutical
  • Diagnostics

Activation Temperature

50°F and 93°F

Response Time

Up to 3 days, 8 days, 14 days


0.75 in × 3.88 in × 0.06 in


Pressure sensitive

Storage Condition

Unused product must be stored in an environment with temperature below the response temperature for optimal shelf life

Shelf Life

Two years from date of sale

Part Numbers

WarmMark Duo 10°C and 34°C WD 10-34

Related Products


If the single use temperature indicator turns red you’ll know your cold chain shipment got too warm.


The SpotSee FreezeSafe indicator provides evidence if a product has experienced unacceptably low temperatures.

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