3D Robotics Digital Airspeed Sensor - Manual (Page 2)

Connect to Pixhawk
Connect the four-wire cable to Pixhawk’s I 2 C port or I 2 C splitter.
Pixhawk I 2 C splitter
Mount
Mount the pitot tube parellel to the fuselage of your aircraft, facing into the wind,
at least 1.5 inches away from the fuselage. Make sure the rubber tubing isn’t bent
to an extent that the air is restricted from flowing freely within the tube.
Check out this 3D-printed mount at Thingiverse.