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MSP430FR6043: huminity measuring

Part Number: MSP430FR6043

Hello,
is it possible to measure the huminity grad of air with FR6043 USS technology?

Regards, Holger

  • Hello Holger,

    The 'FR6043 is not mean for that; It can measure simple transit time through gas very accurately and differential transit time incredibly accurately. This is important to measure flow rates and correct for non-linear effects of pipes for liquids and gas.

    Now the physical background: Humidity has an impact to speed of sound; therefore a time measurement could be used... but also pressure and temperature have an impact of the speed of sound.   ...if you could keep temperature and pressure constant then you have a chance. Still it is not practicable; you would need temperature controlled honeycomb rectifiers with an pressure controlled gas stream. or something similar...  sorry

    for more info look at http://www.sengpielaudio.com/calculator-airpressure.htm

    have fun

         Johann

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