I am in the market for a carbon monoxide meter. I am enough of a pyro to admit I need one for chasing down gas leaks and even analyzing combustion. I wish I could afford an exhaust gas analyzer but some searching shows at least $1000 needed to get in the game. So I am considering a portable handheld CO tester. Does anyone have one that could share their experience with their model? I am leaning towards the Fluke CO-220 which appears to be available for $300. Thanks!