Varduino QT


Ultra sensitive no-lag time variometer combining an ultra-sensitive pressure sensor and an Inertial Measurement Unit (IMU, accelerometer, gyroscope, magnetometer).

Can be connected through Bluetooth or USB to Android and iOS smartphones to run with XCSoar, Flyskyhy, XCtrcack and others.

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Custom fees are possible for deliveries outside of France or Switzerland.

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Lightweight and ultra-sensitive variometer

The Varduino QT variometer combines an ultra-sensitive pressure sensor (10cm resolution, 50 measurements/second) and an advanced signal filtering algorithm to provide the user with an unprecedented reactivity.

A 1W speaker with class-D amplifier is built-in for more natural vario sounds and voice notifications.

It is moreover very compact and lightweight and will be the perfect variometer to assist you during hike-and-fly or to be combined with your smartphone

Bluetooth and USB-OTG communication

The variometer can be connected to iOS and Android phones through Bluetooth. Android and iOS. It features a low-energy Bluetooth chip as well as a USB-OTG chip that is recognized by most apps on Android smartphone.

The most popular applications are compatible, such as:

  • XCtrack
  • XCSoar
  • Flyskyhy

Pressure data are transmitted via Bluetooth. Many data formats are available and can be configured using Varduino Manager.


The Varduino QT features a 1200mAh LiPo battery with a flight autonomy of about 40h at maximum volume. The battery can be charged from USB and the charge status is updated on the display even when the device is off.


The Varduino QT is fully compatible with Varduino Manager. Its sound profile as well as all settings can be easily configured from your computer.

Additional Information

Weight 45 g
Dimensions 64 × 44 × 15 mm


Software featuresVarduino QT
Ultra-sensitive variometer
Sound notificationsVoice, buzzer
Flight tracklogAltitude and vario
Tracklog intervalMax 1point/second
Max recording>50 hours at 1 point/second
Cross country navigation-
Flight start detection
Communication with iOS appsFlyskyHy
Communication with Android appsXCSoar, XCTrack, FlyMe
Bluetooth communcation
USB communicationXCSoar, XCTrack
Volume settings4 levels
Vertical speed smoothing configuration
GPS speed smoothing configuration
Direct configuration form Varduino Manager
Sound profile configuration from Varduino Manager
Custom rescue alarm
UnitsMetric, imperial
LanguageEnglish, French
Technical features Varduino QT
Pressure sensor50 recordings/seconds
MicroSD card-
Wireless communicationBluetooth 4.2, WIFI
Autonomy>40 hours
Case type3D printing - PETG
Size (L x W x T) 64 x 44 x 15mm