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What is a temperature excursion?

The industry word for a period spent outside the intended temperature range. Full explanation →

Why it matters when you shop

Any time a temperature-sensitive product leaves its intended range, usually 2–8 °C. A parcel in a van, a vial on the counter overnight, a fridge door left open. Excursions are cumulative: three short warm spells cost about the same as one long one. The temperature-loss calculator estimates the cost.

What to look for on the listing

  • A min/max thermometer, so an excursion you were not there to see is still recorded.
  • A logger for shipments and travel: it answers "how warm, for how long".
  • An alarm if the fridge shares a house with people who open it.

Go deeper

Products where this number appears

Reviewed 2026-09-03. Definitions describe equipment, not treatment. Affiliate links open your own country's Amazon store; your price is the same.