Wireless Sensor Ruuvi RT4in1 Temperature Humidity Air Pressure Motion

The Ruuvi RT4in1 Wireless Sensor measures temperature, humidity, air pressure and motion in a compact Bluetooth-enabled tag. Designed for continuous environmental monitoring, this sensor is powered by a CR2477 battery (1000 mAh) and offers a small footprint with a height of 12.6 mm, a diameter of 52 mm and a weight of approximately 30 g. Live readings and recorded history can be accessed via the Ruuvi mobile app for Android and iOS, making it possible to monitor conditions at home, at work or in hobby environments.

Advantages

The RT4in1 combines four measurement functions in a single wireless device, reducing the need for multiple sensors. Bluetooth connectivity enables direct smartphone access without additional gateway hardware for many use cases. Its compact and lightweight design simplifies placement in tight spaces, while the included CR2477 battery with 1000 mAh capacity provides long operating life under typical sampling intervals. The sensor’s ability to report temperature, humidity, air pressure and motion gives a broad view of environmental conditions for monitoring and basic diagnostics.

Suitable for

• Home environment monitoring (room temperature, humidity and air pressure)
• Cold storage and pantry checks for temperature and humidity trends
• Workspace and server room environmental checks
• Hobby and DIY projects requiring compact multi-sensor data
• Motion detection for simple tamper or activity indication

Key specifications

• Measured parameters: temperature, relative humidity, air pressure, motion
• Connectivity: Bluetooth (BLE) for direct smartphone communication
• Power supply: CR2477 battery, 1000 mAh
• Form factor: compact tag design
• Dimensions: height 12.6 mm, diameter 52 mm
• Weight: approximately 30 g
• Compatibility: readable with Ruuvi mobile app on Android and iOS

How to use

Install the CR2477 battery according to the device markings, then enable Bluetooth on your smartphone and open the Ruuvi mobile app. Follow the app’s pairing procedure to add the RT4in1 sensor and configure measurement intervals and alert thresholds as needed. Place the tag in the desired location — on a shelf, wall, inside a cabinet or attached to equipment — and ensure it is within Bluetooth range of the monitoring device for live updates. Use the app to review current readings and historical data logs.

Recommendations

For reliable measurements, avoid placing the sensor directly in sunlight or next to heat sources. Position the tag where airflow is representative of the monitored area and away from large metallic objects that may attenuate Bluetooth signals. When long-term logging is required, select sampling intervals that balance data resolution with battery life; check the app periodically for battery status and replace the CR2477 battery when indicated.