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From: "Leon Heller"
Subject: Re: Breathingrate sensor..how/where?
Date: Sat, 19 Oct 2002 12:01:03 +0100
NNTP-Posting-Date: 19 Oct 2002 13:04:48 GMT
X-Newsreader: Microsoft Outlook Express 5.50.4920.2300
wrote in message
> How do I accomplish to measure breathingrate?
> I have seen some belts that are fastened around the waist? on discovery
> to research wheather african sprinter are more "efficient" than the
> Also there are som kind of measure for probe used in polygraph. But where
> just get the probe?
> An alternative could be to make the probe oneself. One idea is to have som
> of mix with metal or carbon to get varying resistance with different
> Question is how to get that done aswell :)
You could fill a thin flexible tube with mercury, fasten this about the
chest, and detect the change in resistance. You would get a quite accurate
measure of the changes in chest diameter, which is really more than you
This technique is often used to measure male sexual
response to visual stimuli - it's called a penile plethysmograph
Leon Heller, G1HSM
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