SparkFun Air Velocity Sensor Breakout - FS3000 (Qwiic) (SEN-18377)

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The SparkFun FS3000 Qwiic Air Velocity Sensor Breakout can help you accurately determine the speed and consistency of air moving around you…

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Just after the plane of measurement the “SparkFun Air Velocity Sensor Breakout - FS3000 (Qwiic)” has. Does it simply measure air flow in one plane across the device?


Hi Aaron,

Welcome to the forum! Sorry for the delay in getting back to you.

Yeah, the sensor itself is just measuring the air speed through the small opening on the top side:

I’m not certain what kind of readings to expect if the windspeed is reversed.
To get more directions you might be able to use a 360 degree servo to change the angle!


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Hi Aaron and Liam,

That’s exactly right, as seen on the FS3000 Datasheet by the pinout the direction of flow is fixed through the sensor on the board, so you’ll want to make sure that it is inline with the expected direction of airflow as it is a sensor designed to measure directional laminar flow.

If you’re after a way to measure turbulent wind conditions I’d suggest looking into a multidirectional anemometer instead.

Regarding reversed flow, to my knowledge, since the FS3000 uses heated thermopiles in order to determine velocity by count of how quickly air passes across the sensor and cools it down, essentially you’re using the average cooling due to convection to measure airspeed. Therefore as far as I can tell if the flow is reversed it’d cool by the same amount and should give you the same count or rate of flow
(that being said, I suspect that there might be either a check valve like shape inside the sensor designed to redirect airflow over the sensor etc. so I’d need to do some experimenting first to confirm for sure)

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