If stored under the correct conditions, this is highly unlikely to happen, but if it does, the built-in activation window lets you know it. If this happens, don’t use the indicator and select another. There is no need to contact us, as we ship 1 or 2 extra indicators per pack free of charge anyway.

Any blue colouration of the indication window (partial or full) denotes a temperature breach of 10°C.

The activation window gives an immediate confirmation that the indicator is armed as it turns from yellow to green. If this doesn’t happen immediately, then fully re-squeeze the button between thumb and finger. The breach/indication window (white with a red border) is separate so that you can clearly see if there has been a breach of the 10°C/50°F temperature threshold. If no breach has occurred the window will remain white. It will turn blue if there is a breach.

The expiry date is provided for each batch of products supplied. You will find it on a label on each box together with the batch coding we use for traceability.