Hot Wire Anemometer

[N H Moon]

I am planning to design & construct a hot wire anemometer. I am facing problem to find the required data. I search in the internet but couldn't get the data.   How can i start my project & where i can get the information?

[admin]

I have found a simple circuit diagram about hot wire anemometer. May be a good point to start. Look at the bottom of this page:

http://newton.ex.ac.uk/teaching/CDHW/Sensors/

Also check this slides about the theory behind it: http://www.ara.bme.hu/oktatas/tantargy/NEPTUN/BMEGEATMW03/2012-2013-II/Presentation/Hot-Wire Anemometry.pdf

 

 

[Externet]

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