Hi gang, A question for the more chemistry literate listers: Is it possible to convert %CO to a parts/million (PPM) equivalent? Reason I'm asking is that Fluke has a couple of new CO gas measuring probes that read 0-1000 ppm with a 3% accuracy. The accessory aspirator probe looks perfect to gather EG samples from the CO measurement tube. Regards, Tony Lum Chemical illiterate