Mmm By mollmass I gues (translation issues) that you mean the unit of
concentration. Now, how do you say I should detects CO2 an O2 ?

Mauricio Jancic
Janso Desarrollos
Microchip Consultant Program Member
info@janso.com.ar
www.janso.com.ar
+54 11 4542 3519

> -----Original Message-----
> From: piclist-bounces@mit.edu [mailto:piclist-bounces@mit.edu] On Behalf
> Of Stef Mientki
> Sent: Sunday, February 19, 2006 2:20 PM
> To: Microcontroller discussion list - Public.
> Subject: Re: [EE]Breath airspeed measurement
> 
> 
> >-          What about a couple of ultrasonic transducers and measuring
> the
> >propagation delay?
> >
> >
> >
> >
> should work very good, ...
> ... you even determine the mollmass.
> You know that the expired air is 36..37 C,
> 100% saturated with water,
> contains ...% CO2
> contains ...% O2
> so you might even detect the alchol directly through mollmass.
> 
> Stef Mientki
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