Wind Sensor Rev P
No more waiting. New stock is expected into QA this weekend.
New: A compact anemometer sensitive enough to detect human breath. A refinement of the popular Wind Sensor Rev C, this design incorporates hardware ambient temperature compensation. An accurate temperature reading is used internally for correction and is made available on the interface. Based on the time-proven "hot-wire" method, this technique excels at low to medium wind speed. Great for sensing weak indoor air movement, where the spinning cup anemometers are ineffective.
The PCB is fully assembled and packaged complete with loose 5pin male headers for a choice of mounting vertically or horizontally.
Note that as well as the usual logic level voltage, you need an additional power feed to supply the heating current (8-12V, ~40mA depending on wind speed).