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RE: Gunson CO2 meters, Air intake sensor
> I have opened a Gunson, and it appears that it uses a heated wire
> bridge that compares the intake gas with a closed off reference. It
> has to warm up for abt. 15 mins before measuring.
I understand the Gunson uses a hot wire technique similar to that used
for airflow sensors on the newer Motronic-equipped cars. It runs a
known flow rate of air past the wire, and infers the CO2 content based
upon how much cooling of the wire occurs. My understanding is that it
is a very slow process
> Measuring mixture setting whilst driving?
> That brings up a question, what would be a good way of measuring
> mixture setting whilst driving? (Our cars were not equipped with a
> sensor and mixture setting makes a huge difference in the car's
> Charles Probst talks about measuring gas temperature in the
Nobody's stopping you from mounting an OXS in your exhaust tract and
hooking it up to a CO meter though. If you used a heated OXS you might
even be able to make a portable unit that attached to the exhaust pipe
or CO tap tube ... if you have one ...
> Air intake sensor
> You might want to solder spade connectors onto the wires.
I believe that the sensor is hardwired in there for a purpose. I'd
recommend that if you do add some sort of connector that it have gold
plated contacts to minimize the change in resistance.
San Jose, CA (USA)