What is the best airspeed sensor?

Hi I have always had trouble with the standard 4525 airspeed sensor. Have to calibrate multiple times during a flight day, sometimes says the static and dynamic need to be swapped after functional use, and then they just start reading bogus values and I have to switch out the entire sensor. Then it works fine the next day. Anyway, I want to get a new airspeed sensor and I don’t know which one is the best. Here is the list of supported ones:


4525 (which seems to be made by multiple manufactures: https://store.mrobotics.io/mRo-I2C-Airspeed-Sensor-JST-GH-p/mro-classy-arspd-mr.htm

5525: https://store.mrobotics.io/mRo-Next-Gen-MS5525-Airspeed-Sensor-NEW-p/mro-ms5525v2-mr.htm

EagleTree: https://www.eagletreesystems.com/index.php?route=product/product&product_id=63

Sensirion: https://store.drotek.com/sdp3x-airspeed-sensor-kit-sdp33

To me it seems the sensirion would be the best because it comes pre-calibrated and temperature compensated. Any insight would be appreciated.

I am using this on a fixed wing platform flying between 10-20 m/s. At the beginning I will be flight 100m AGL (1540m MSL) but have plans for very high altitude flight in the future.

I was literally about to write the same post - we are having similar issues with the 4525 and the 5525 on our VTOL platform. I’m interested to see if anyone has ever had a good experience with any airspeed sensor on the PX4 platform.

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I also posted the same thing on ardupilot so hopefully I get a response on one of these forums. One good source I found is this: http://www.olliw.eu/2018/uc4h-air-airspeed-node/

I suggest the SDP33. But i have no experience to this time.

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i have used Sensirion SD33 on my fixed wing, VTOL and Tiltrotor and never faced any critical problem. It is very nice so far !!
Flight speed : 10-30 m/s
Altitude : 600 m ASL


Very Happy with SPD33.
Fixed wing 8-20m/sec
Altitude 100m