After squeezing the button flat a line will emerge in the window to show that the Timestrip® is activated. If the activation line is already present before you activate it, then discard that indicator and take another.
Liquid Indicator Technology
Timestrip indicator labels are single use, low cost, patented technology diffusing liquid through a viewing window to reveal how much time has passed since activation or temperature breach
eTimestrip App for pdf reporting
Download our eTimestrip app today. It is compatible with most of our electronic indicators and can be used to generate data report PDF and CSVs to save and share.