Monitor your van, fridge, battery box, or overland rig — wirelessly, from your phone.
The RuuviTag is a compact, open-source Bluetooth sensor that broadcasts temperature, humidity, air pressure, and motion data in real time. It's a favourite in van builds and overland setups because it works without a hub, connects straight to your phone via the free Ruuvi Station app, and also integrates with Victron Cerbo GX — making it easy to keep tabs on your fridge compartment, battery room, living space, or any area where conditions matter.

What you can monitor:

Fridge or freezer temperature — know it's holding cold without opening the door
Van habitation area — track temperature and humidity to manage condensation
Battery and electrics compartment — catch overheating before it causes damage
Water tank or storage locker — monitor for freezing on winter trips
Outside ambient temperature and pressure — useful for weather awareness on remote expeditions


Works with:

Victron Cerbo GX (via Bluetooth)
Ruuvi Station app (iOS and Android — free)
Home Assistant, Node-RED, and other open-source platforms


Specifications:

Sensors: Temperature, Humidity, Air Pressure, Motion (accelerometer)
Operating range: -20°C to +70°C (recommended); -40°C to +85°C (max)
Accuracy: ±0.2°C temperature, ±2% humidity, ±1 hPa pressure
Battery: CR2477 (1000 mAh, included) — typically 12–18 months
Connectivity: Bluetooth 5 / BLE
Waterproofing: IP67
Dimensions: 52mm diameter, 12.5mm tall, 30g
Certifications: CE, FCC, RoHS, IP67


Pair with the RuuviTag Silicone Case to mount it anywhere using screws, zip-ties, or adhesive. For harsher environments — engine bays, external cab mounts, or anywhere with condensation risk — consider the RuuviTag Pro.