Monitor and maintain correct temperature in a fridge
Most foods keep well when kept at recommended temperatures. However, meat and fish products stored in the fridge are much more easily spoiled than other types of food. These products should always be stored below 3 °C, which makes it important and advantageous to monitor the temperature inside your fridge.
Temperatures inside the fridge can vary considerably between different shelves and it is difficult to monitor optimal conditions using the fridge’s thermostat alone.
If the temperature inside a fridge exceeds 6 °C, the bacteria in the food will begin to grow rapidly. In addition, cold air keeps food fresh, as it slows down natural ripening in fruits and vegetables. Read more about storing temperatures from Finnish Food Authority.
Avoid putting warm food in the fridge for temperature control and energy consumption reasons. Hot food brings moisture to the fridge, which condenses and freezes in colder temperatures. Frost on the inner surfaces of the fridge disturbs the functioning of the refrigerator and increases energy costs. It’s important to note that the temperature on the door shelves is significantly warmer than the inside of the fridge, and it doesn’t go down nearly as much as it does in the back of the fridge.
You can ensure the safety of your food and minimise food waste by monitoring fridge and freezer temperatures using Ruuvi sensors. Place one sensor in the fridge door, another one in the vegetable box and the third near the back wall of the fridge. You will notice a difference in the temperature of the different locations. With Ruuvi’s mobile app, you can track temperatures easily and set alerts for when they exceed their optimal limits to help you maintain safe conditions. The notifications are also convenient if the door of the fridge or freezer has been accidentally left open or if the fridge has broken down.
Temperature in a crisper
Temperature inside the crisper doesn’t have to be as cold as in the parts you keep meat, fish and dairy products. On the other hand, the temperature shouldn’t be too cold for the vegetables to freeze. The main purpose of the crisper is to keep in humidity and thus create an optimal environment for vegetables to stay fresh for a longer time.
In some fridges, you have the option to choose either high or low humidity setting for the crisper. High humidity is best suited for vegetables, while low humidity is better for fruits. Keep in mind not to store vegetables and fruits in the same place because some fruits emit ethylene, which ripens up and spoils vegetables quickly.
Monitor the temperature and air humidity inside the crisper conveniently with Ruuvi’s sensors.
Measure Fridge And Freezer Temperature With RuuviTag
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39,90€
Ruuvi is based in Finland. If you’re an EU consumer, VAT is included. If you’re a non-EU customer, you don't pay VAT. If you're an EU business, insert your VAT ID at checkout.
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RuuviTag Sensor (4in1)
| Quantity | Unit Price(€) |
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Excellent!
After integrating four RuuviTags into my Victron Cerbo GX / VRM system in our Rapido motorhome, I can honestly say they have transformed the way I monitor the vehicle.
The setup now provides live temperature, humidity and pressure monitoring directly inside the VRM portal, allowing me to monitor critical areas including:
Battery Box
Orion DC-DC Charger Compartment
Engel Fridge
Main Rapido Fridge Area
What impressed me most was how seamlessly the RuuviTags integrated with the Cerbo GX via Bluetooth. Once connected, the data appears natively inside VRM and can be used for real alarms and automation.
I have now configured:
High temperature alarms
Low temperature alarms
VRM email notifications
Relay-triggered audible siren alarms
The system is now capable of warning me immediately if:
the lithium battery compartment gets dangerously cold
the battery box overheats
the Orion compartment becomes too hot
ventilation or airflow problems occur
The accuracy and stability of the readings have been excellent. The tags update reliably and provide a very clear picture of what is happening inside the motorhome.
One of the major advantages is that the system no longer relies on older digital-input alarm methods or complex workarounds. The RuuviTag + Cerbo GX combination feels like a modern, professional-grade monitoring solution.
The compact size, long battery life and wireless operation make installation extremely easy. No extra wiring was required for the sensors themselves.
For anyone building a Victron-based off-grid system, especially in a motorhome, caravan, marine or lithium battery installation, I would highly recommend RuuviTags.
They add a level of visibility and protection that is difficult to achieve any other way at this price point.
perfect to log my boat conditions when i’m away, and check pressure variations in real time when i sail