enig63A5C94AD2DC352C6F9C1E77 Content-Type: text/plain; charset=ISO-8859-1 Content-Transfer-Encoding: quoted-printable
I have a need of a device to measure carbon monoxide content of car exhaust. Anyone have suggestions for a homemade device? A resolution of
mike
You'll find the information you want here:
The circuit is called a "potentiostatic" circuit.
Auto gas analysis usually uses large rugged sensors which are more resilient to temperature and cross-interference from other gases than the small types used in e.g. portable instruments. Gas sensors always have problems with cross-sensitivity, even to humidity sometimes. That's why they have so many membranes and filters inside.
Nemo
The wikipedia article is a bit more helpful
Carbon monoxide has a single strong infra-red absorbtion line at 2143 cm^-1, (4666 nm) corresponding to the C-O stretch, but it might be difficult to exploit this in a home-made device.
-- Bill Sloman, Nijmegen
Have something to add? Share your thoughts — no account required.
Ask the community — no account required