HEATmarker Time-Temperature Heat Indicator

HEATmarker® is a time-temperature integrator that is applied to temperature-sensitive products to monitor the combined effects of time and temperature

Time-Temperature Heat Indicator

The combined effects of time and temperature cause gradual and cumulative degradation of many temperature-sensitive medical products. HEATmarker time-temperature heat indicators monitor heat exposure and provide an irreversible visual signal of heat exposure over time.

The response time and temperature of each HEATmarker make up its temperature profile. The HEATmarker indicator gradually changes color when exposed to heat over time, and reaches endpoint when it has been exposed to the time-temperature limits of its temperature profile.

Visual Heat Indication

HEATmarker Heat Indicator
The indication area – either an inner square or circle – of HEATmarker is made with a heat-sensitive material. It is initially light in color and becomes darker when exposed to heat. At the end point, when the cumulative heat exposure has reached the time-temperature limits of its temperature profile, the indicator will either be the same color as or darker than the outer ring surrounding it.

Preserve Product Supplies

HEATmarker color transitions from light to dark faster at higher temperatures and slower at lower temperatures, just as many heat-sensitive products are affected more rapidly at higher temperatures than at lower temperatures.  This allows users to maximize efficiency by using those products being monitored by HEATmarkers that have not yet reached end point, and only disposing of those products with HEATmarkers that have reached their endpoint.

HEATmarker Hx Series – 37oC Response Temperature

HEATmarker is a miniaturized, self-adhesive label that can be applied to flat or curved individual units of temperature-sensitive medical products.

HEATmarker Hx Response Temp Response Time (days) Accuracy* Shelf Life Size
HEATmarker Hx36 37oC 36 +/- 2oC 4 years 11 mm diameter
 37oC 24  +/- 2oC  4 years  11 mm diameter
 37oC 18  +/- 2oC  4 years  11 mm diameter
 37oC 12  +/- 2oC  4 years  11 mm diameter
 37oC 9  +/- 2oC  4 years  11 mm diameter

*Accuracy at 0.1% AQL

HEATmarker Hu Series – 25°C Response Temperature

HEATmarker is a miniaturized, self-adhesive label that can be applied to flat or curved individual units of temperature-sensitive medical products.

HEATmarker Hu Response Temp Response Time (days) Accuracy* Shelf Life Size
25oC 41 +/- 2oC 4 years 11 mm diameter
 25oC 28  +/- 2oC  4 years  11 mm diameter
 25oC 14  +/- 2oC  4 years  11 mm diameter

*Accuracy at 0.1% AQL

HEATmarker M, H and E

HEATmarker is a miniaturized, self-adhesive label that can be applied to flat or curved individual units of temperature-sensitive medical products.

HEATmarker Response Temp Response Time (days) Accuracy* Shelf Life Size
8oC 8 +/- 1.5oC 225 days 16 x 11 mm
8oC 21  +/- 1.5oC 1 year  16 x 11 mm
60oC 30  +/- 1.5oC 30 days  16 x 11 mm

*Accuracy at 0.1% AQL