I've been rooting around to see who is making chemical sensor chips.
Unfortunately, I'm wading through swamps full of people who are GOING
to make one, or have cool new ways to make one, but I'm not finding
companies who ACTUALLY have one that I can buy today.

I don't have a specific chemical in mind, but I'd like to see
something that can detect a wide range, even if it's done by selecting
which device I use at runtime, or changing sensing elements, or
whatever.

Anyone have leads?
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