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Could anyone suggest the type of pressure sensor I need to measure human breath? When someone blows into the device I want to measure them blowing in and also sucking out. Could this be done with Barometric sensors?

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  • \$\begingroup\$ Do you really want to measure 'pressure' - like blowing up a balloon, or are you more interested in flow, like blowing out candles? \$\endgroup\$
    – brhans
    Commented Jun 22, 2019 at 16:08
  • \$\begingroup\$ @brhans I want to measure the person's breath "blowing" into a tube and sucking air out of the tube. \$\endgroup\$
    – David
    Commented Jun 22, 2019 at 16:10
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    \$\begingroup\$ Sounds something like the kind of sensor used to assess someone's lung function. Airflow sensor - spirometer. \$\endgroup\$
    – brhans
    Commented Jun 22, 2019 at 16:15
  • \$\begingroup\$ So, in your question you say "blowing" which is ambiguous. We ask "pressure or flow" to clarify, and you say "blowing". So -- pressure, or flow? Normal spirometers present very low back-pressure, but that doesn't mean that you want to do this measurement with low back-pressure. \$\endgroup\$
    – TimWescott
    Commented Jun 22, 2019 at 17:03
  • \$\begingroup\$ @TimWescott I want to measure flow \$\endgroup\$
    – David
    Commented Jun 22, 2019 at 17:06

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Since a barometric sensor is used to sensing pressure in gases, which is exactly what you want to do: yes. That's the type of sensor you're looking for.

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