Air speed sensor which enables it to register extremely accurate airspeed readings. This sensor does not suffer from noise caused by long cables or from offsets caused by ratio-metric outputs which older analog airspeed systems suffer from.

Specifications:

• A modified version of the airspeed head adopts digital differential pressure sensor 

• I2C communication

• Suitable for PIXHAWK

• Adoting PX4 ORIGINAL FIRMWARE

          http://ardupilot.org/plane/docs/airspeed.html