Cor! Strike a light!
....what I'm looking
> for is a sensor that will detect an *explosive* mixture (probably butane
> concentration in air), which is a little more precise in terms of
> proportions of impurities in the air. Can anyone suggest a source
> for a sensor that can do this?
I don't even want to know how you tested the sensor from Sharper Image.
Anyway, do a google.com search for "gas leak detector" (try with and without the quotes). You'll get plenty of ready-made products, but also a number of hits to component-level sensors. Several are for a variety of cumbustible gasses, with and without odorizers.
Also look up the UEI CD100A, a low-cost consumer-level detector unit. Maybe you can hack into it.
-- Gordon Robots for Less at Budget Robotics:
steamer wrote:
Talk to a local utility that does any kind of underground vault work (electric, gas, water, cable) They will typically have a guy that calibrates their units and tests them regularly. A few kind words may get you an unofficial test run.
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