Airspeed sensors are highly recommended for fixed-wing and VTOL frames. They are so important because the autopilot does not have other means to detect stall. For fixed-wing flight it is the airspeed that guarantees lift not ground speed! The for digital differential airspeed sensor has a very low offset, a high resolution and, best of all, does not suffer from the noise induced by long cables and offsets in the ratio-metric output on the 2.6 analog airspeed sensor. Featuring a Measurement Specialties 4525DO sensor, with 1 psi measurement range (roughly up to 100 m/s or 360 km/h or 223 mp/h), the for Airspeed Sensor Kit enables a resolution of 0.84 Pa, with data delivered at 14 bits from a 24 bit - ADC. It also measures temperature to allow calculation of true airspeed from indicated airspeed using the MS5611 static pressure sensor on for . Not influenced by the heat of nearby processing components, it is much closer to the air temperature than with previous analog sensor setups. Supported on all for and PX4 autopilot generation boards, this kit comes with M3 / 6-32 mounting holes. The appearance and color of different batches of products may be different, which not affect the use. Colour:As Shown Material:Plastic+Metal Package Contents: 2 x Airspeed Sensor 2 x Pitot tube Only the above package content, other products are not included. Note: Light reflection and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is +/- 1-3cm.