Storing vials cold, and proving that you did

Everything for proving vials stayed at 2–8 °C (36–46 °F) at home: min/max thermometers, USB loggers, Wi-Fi sensors and power-failure alarms, plus a desktop mini fridge (thermoelectric, so it holds the range only in a cool room) and the cases, bins, amber bags and sleeves that keep vials upright, dark and in one piece. A fridge dial is not a thermometer, a fridge that lost power at 2 a.m. looks perfectly cold at 7, and the door shelf is the warmest spot in the whole appliance, so the measuring equipment is the part that earns its money; the fridges are optional.

How do you know vials stayed at 2–8 °C (36–46 °F)?

Thermometers come in three levels. A min/max thermometer remembers the highest and lowest it has seen, which turns "it looked fine when I checked" into a range. A USB logger records a reading every few minutes and exports the history, so you can answer what happened at three in the morning last Tuesday. A Wi-Fi sensor does the same and tells your phone while it is happening, which is the only one of the three that can still save something. A plug-in power-failure alarm covers the case none of them do: the socket, not the fridge.

For the fridge itself, the honest comparison is with the kitchen. A compressor fridge holds a set temperature; a thermoelectric desktop fridge only gets so far below the room it stands in, which in a warm room may not be far enough. That is why the fridge is the nice-to-have and the thermometer is the must-have. The rest of the shelf is organisation and protection: a hard case with foam slots so vials stand upright instead of rolling, a clear bin so the whole kit comes out in one movement, amber bags because light degrades as surely as heat does, silicone sleeves because glass and tile floors have a bad history, and desiccant for anything stored a long time.

What differs between listings

  • How it cools is the cooling method. Compressor fridges hold a set temperature like a kitchen fridge; thermoelectric ones only get so far below room temperature; ice packs and evaporative sleeves are for hours or days, not weeks.
  • Whether it can hold 2–8 °C (36–46 °F) on its own, or is only colder than the room.
  • Whether it keeps a history, and whether it can alert you while something is going wrong rather than afterwards.

Everything in Storage & Cold (16)

Narrow this category by specificationCompare side by side

Written comparisons

Guides for this shelf

Last edited . Equipment only: nothing on this page is advice about what to inject, how much, or whether a product is fit to use. That comes from the product's labelling and whoever supplied it. Product pages link to your own country's Amazon store through affiliate links; your price is the same.