MATEKSYS Digital Airspeed Sensor (ASPD-4525)

https://www.getfpv.com/matek-digital-airspeed-sensor-aspd-4525.html

The plastic tubes should not be pinched or bent in a small radius. The cables coming out of the sensor board should also be accommodated.

There is 1 size M2 mounting hole on the pitot tube. If this is fastened, rotation around the bolt can still occur. Recommended fastening includes some kind of clamp around the plastic base.

The pitot tube (40 mm grey tube) must have unobstructed airflow. It should be pointed into the direction of forward flight - for example, on the nose cone, or on the leading edge of a wing if mounted on a plane.

Note that “forwards-facing” may require a slight upwards angle when the aircraft is on the ground. The airspeed sensor should be as close to parallel with the ground when the aircraft is in fixed-altitude forwards flight.