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Air Data Unit
The Air Data Unit is used to measure pitot airspeed and barometric altitude in fixed wing aircraft. It features high accuracy temperature calibrated pitot and static air data sensors and outputs data over RS232. It can be used standalone or connected to one of Advanced Navigation's Spatial series of GPS/INS products for outstanding navigation accuracy in fixed wing aircraft when GPS is not available.
Temperature Calibrated Pressure Sensors

The Air Data Unit features very high accuracy absolute and differential pressure sensors. These are factory calibrated over a wide temperature range to further increase measurement accuracy and provide the best air data possible through varying conditions.

Power Up Self Calibration

On top of factory temperature calibration, every time the air data unit powers up, it performs a self excitation calibration to adjust for small deviations of bias and scaling error. This allows the system to compensate for calibration ageing and means that it never needs to be returned to the factory for recalibration.

Miniature Rugged Enclosure

Air Data Unit's precision air craft grade aluminium enclosure is waterproof and dirtproof to the IP67 standard and shockproof to 100g, allowing it to stand the test of time under tough conditions. It's minimal size, weight and power requirements allow for easy integration into almost any aircraft.


The Air Data Unit is protected from surges, reverse polarity, brown outs and overvoltage to continue operating through harsh electrical conditions. It's communications interface is optically isolated to prevent ground loops and protect sensitive equipment connected to it. It is built on top of a safety oriented real time operating system and all software is designed and tested to safety standards with fault tolerance in mind.


Air Data Unit is ideal for UAVs to provide a cost effective source of high accuracy airspeed and barometric altitude. It's small size, weight and power requirements allow for easy installation into smaller UAVs. When combined with one of Advanced Navigation's Spatial series of GPS/INS products it can allow the UAV autopilot to continue flying autonomously through extended GPS outages.

Survey Aircraft

Air Data Unit can save time for fixed wing aircraft performing real time survey work that cannot afford to have survey data corrupted by short term GPS outages.

Recreational Aircraft

Air Data Unit is a great choice for recreational aircraft owners looking for a low cost, high accuracy source of airspeed and barometric altitude to power instruments.

Altitude Accuracy1.0 m
Altitude Resolution0.0015 m
Maximum Altitude40,000 m
Airspeed Accuracy0.25 m/s
Airspeed Resolution0.0001 m/s
Maximum Airspeed250 m/s
420 m/s version available
Calibrated Temperature Range-10 to 60 °C
Interface IsolationOptically Isolated
Speed115200 baud
ProtocolAN Packet Protocol
Output Data Rate20 Hz
Operating Voltage5 to 36 V
Input Protection±40 V
Power Consumption(Typical)0.075 W
Operating Temperature-40 to 85 °C
Environmental ProtectionIP67
Shock Limit100 g
Dimensions48x30x32 mm
Weight55 grams
Direct Link
Air Data Unit Reference Manual
Air Data Unit 3D Model
Air Data Unit Viewer v1.1

Air Data Unit Viewer is a basic utility to view the data from the Air Data Unit. Java is required to run this program. Released 7th September 2015.

Air Data Unit SDK v1.0

The Air Data Unit SDK provides royalty free example source code for interfacing with Air Data Unit through the AN Packet Protocol. The languages provided are C/C++, Java, and .Net C#.