Freezer is too warm
According to FDA, too warm freezer predisposes food to harmful growth of microbes and shortens the lifespan of food products. Too warm fridge also cools down food too slowly and freezing doesn’t happen fast enough.
Freezer is too cold
A too cold freezer can impose problems. Cooling takes a lot of energy, but freezing temperatures can also change the taste and texture of food. This does not make it inedible or dangerous, but it’s a good idea to take this into account, especially when freezing meals – choose airtight containers for this purpose. On the other hand, a freezer that is too warm exposes food to growth of harmful microbes.
Proper temperature in a chest freezer
Temperature in a chest freezer should be the same as in a regular freezer, at -18 °C. Often, a chest freezer could be used to freeze larger quantities of food. If you know that you will fill up to freezer with more food, you should set temperature to below -20 °C.
If you have a chest freezer, place one Ruuvi sensor at the top of the freezer and the other at the bottom of the freezer. Sometimes the built up frost in the freezer can cause the cover seal to leak. In this case, we suggest placing the Ruuvi’s measuring device at the top of the freezer to detect undesirable changes in temperature.
Energy efficiency of a freezer
Monitoring the temperature in a freezer is beneficial as you can increase the energy efficiency of this home appliance. Refrigeration appliances consume a lot of energy, especially if they cool a space unnecessarily. In addition, the frost building up to the walls of a freezer decreases the energy efficiency of the machine significantly. The temperatures mentioned in this article are sufficient for food safety. If your freezer is colder than the temperatures mentioned in this article, you can warm up your freezer a bit and hence decrease your energy consumption.
A large amount of ice accumulated in the freezer increases energy consumption and weakens the operation of the freezer. The picture below shows how the temperature before defrosting varies by about 4 degrees and only one degree after defrosting.
With Ruuvi’s sensors, you’ll know exactly what temperatures your refrigerators are running at. The graph feature in the Ruuvi app is perfect for monitoring the temperature of your fridge or freezer. You can clearly see at which temperatures your refrigerator is at its coldest or warmest. This allows you to conveniently adjust the appliance’s thermostat to match actual temperatures.
Monitor the temperature in your freezer!
With RuuviTag, you can always know accurately the temperature in your freezer.
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)
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RuuviTag Sensor (4in1)
| Quantity | Unit Price(€) |
|---|---|
| 1 | 39,90 |
| 2 | 37,40 |
| 3-5 | 36,90 |
| 6-8 | 35,90 |
| 9-12 | 34,90 |
| 13-25 | 33,90 |
| 26-99 | 32,90 |
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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