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At What Temperature Should Insulin Be Stored?

Insulin should generally be stored in the refrigerator at 2–8 °C (36–46 °F). These temperatures ensure the quality, effectiveness and safety of insulin. Depending on the product, insulin that is being actively used will keep at room temperature for 4-8 weeks, but please check the product's package insert as it may vary by manufacturer. Temperatures above 30 °C (86 °F are already harmful to insulin and if insulin freezes or warms up to over 50 °C (122 °F), it will spoil.

It is important to store insulin in the correct conditions, as the wrong conditions will reduce the effectiveness of the insulin or spoil it completely. Unused insulin should be stored in the refrigerator, once you have ensured that it is within the allowed temperature limits. Older refrigerators in particular can cool to freezing temperatures without you noticing, if they are set incorrectly.

When using insulin, you can store it at room temperature. When you’re on the move, it’s best to keep insulin close to your body in cold weather. In hot weather, it may make sense to keep a separate cooler for your insulin to protect it from getting too warm.

Insulin should also not be stored in direct sunlight, as the sun destroys the chemical structure of insulin, making it less effective. In addition, sunlight can significantly increase the temperature locally.

Measuring the storage temperature of insulin with a temperature sensor

To keep insulin in the best possible conditions, it is a good idea to monitor its storage temperature continuously. Whether it is a home fridge or a cooler used on the move, knowledge of its actual temperatures is important for the safe use of insulin. In addition, a temperature sensor can alert you if the temperature is about to reach unsuitable levels and you have time to change the conditions before it is too late.

The RuuviTag Bluetooth environmental sensor is a Finnish innovation that is perfect for insulin temperature monitoring. It’s small and durable, works wirelessly with your phone and the battery lasts around two years under normal conditions. RuuviTag works within the Ruuvi app, where you can set customised alarms, track history charts and view real-time measurement results, among other things.

RuuviTag measures air temperature, humidity, pressure and movement of the sensor itself.

You can set the Ruuvi app to send a push alert if your insulin is not at 2-8 °C (36–46 °F). This way you don’t need to constantly monitor the storage temperature of your insulin. You can also use the RuuviTag to check the temperature of unfamiliar fridges or cold spaces. Initially, set the RuuviTag to measure the temperature before exposing the insulin to potentially harmful conditions.

Note! Ruuvi’s products are not designed or manufactured for a medical use and should not be used for critical or life supporting applications. For medical products such as insulin, check the product packaging for proper instructions and storage conditions. We do our best to keep our hardware and software in the best possible condition, but we do not guarantee 100% availability and data integrity. The information on this page is in no way a substitute for information or advice from medical professionals and should not be followed if it conflicts with previously obtained information or advice. The use of RuuviTag is at your own risk and Ruuvi Innovations Ltd is not responsible for any damage caused by its equipment.

Buy Your Own RuuviTag
Store your products in the correct conditions

Buy Your Own RuuviTag

Store your products in the correct conditions


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RuuviTag is a Bluetooth sensor that monitors environmental conditions and sends the data directly to your mobile device. The Ruuvi Station mobile app allows you to view real-time accurate measurements and historical graphs. The app also provides customisable alerts to notify you of critical conditions, such as a melting freezer, excessively high bedroom temperatures that could disrupt sleep, or elevated humidity levels in your basement.

Onboard Sensors (4-in-1)

Temperature: °C, °F, K; typical accuracy ±0,2 °C @ 5-60 °C (±0.36 °F @ 41-140 °F).
Air humidity: RH-%, g/m3, dew point; typical accuracy ±3 RH-% @ 20…80 %. Range: 0-95 %.
Air pressure: Pa, hPa, mmHg, inHg; typical accuracy ±1 hPa. Range: 500-1155 hPa.
Motion: Movement counter. Counter is incremented when acceleration exceeds the threshold on any axis.

Operational Conditions

Operating temperature (with stock battery): -20 °C to +70 °C (-4 °F to 158 °F).
Absolute maximum operating temperature: -40 °C to +85 °C (-40 °F to +185 °F).
Housing: IP67, splash-proof, non-condensing location.
Battery: User-replaceable CR2477 (included). Supports extended operating temperature range battery CR2477T.
Battery lifespan: Estimated 12 to 24 months.
Bluetooth range: 5-20 meters (indoor), 20-100 meters (outdoor). The sensitivity of the receiving mobile device’s antenna, obstacles and wall materials affect the range. For increased range, use the Ruuvi Gateway router as a receiver.

App Features

Free and easy: User-friendly free app, signing in is optional.
Android and iOS.
Alerts: Configurable Bluetooth push alerts with customisable messages.
Real-time measurements: Track data in real time.
Historical data: Detailed historical graphs available for up to 10 days (offline).
History export: 10-day history export.
Dashboard: See all your sensors at a glance.
Personalise sensors: Use custom backgrounds and names.
Multilingual: Available in English, Finnish, Swedish, French, and German.


Integrations: Victron Energy, Home Assistant, Homey, and more.
Remote monitoring: When not within Bluetooth range, online remote monitoring is available with the Ruuvi Gateway and Ruuvi Cloud, both sold separately.

Technical Specifications

Data sheet: Download (pdf)
Read more info below:

Below you’ll discover other use cases!