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Hot Wire Anemometer

N H Moon

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If you end giving up on the design and construction,  hot wire air flow meters are dumped daily by the many hundreds.

You can obtain them for few $ at a car boneyard.  They are called MAF sensors and in many flavors and sizes.  There is at least two types; one outputs a frequency and another voltage.  Discern which with an oscilloscope.  They are powered usually by 5V, the 3 terminals are +, -, out.

They look like ----> https://duckduckgo.com/?q=air+mass+sensor&t=canonical&iax=1&ia=images

Get a wiring pigtail with its mating connector.

Some information ----> https://en.wikipedia.org/wiki/Mass_flow_sensor

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