Irreversible Heat and Reversible 18°C Indicators

Used to monitor the temperature exposure of vaccines globally since 1996, identified as a critical component by the World Health Organization and UNICEF, HEATmarker VVM is an indicator containing a heat-sensitive material that is affixed to a vaccine vial by the manufacturer to allow for full-life monitoring.

HEATmarker VVM+ was developed specifically for monitoring heat stable vaccines. HEATmarker VVM+ combines traditional HEATmarker VVM cumulative heat with innovative peak temperature indication technology addressing the risk that vaccines stored outside of the cold chain may be subjected to a peak temperature excursion which could cause rapid degradation.

LIMITmarker irreversible temperature indicators can be applied directly to heat-sensitive products, available with delayed (2 hrs) or immediate (15 secs) Indication. When exposed to temperatures at or above the response temperature, the heat indicators change color within a specified response time to give a visual warning.

LIMITmarker Reversible 18⁰C indicators can be applied to the primary packaging of products, providing a clear visual sign when a refrigerated product becomes warm enough to use. The indicator is sold blue when cold (at or below 8⁰C), then changes color and reveals an "OK" message when it approaches room temperature (18⁰C +/- 2⁰C).

TransTracker can contain multiple indicators on one card. Choose from HEATmarker, LIMITmarker or FREEZEmarker temperature sensing indicators. These single-use indicators can be placed in shipment packaging to monitor temperature exposures during shipping. TransTracker indicators can be customized with branding and consumer information specific to your use case.