This one is courtesy of our friends at the American Chemistry Council A part-per-million can be thought of as: A credit card lying in the middle of a football field One step, on a 568–mile (914 km) walk One minute, in a two-year span A part-per-billion can be thought of as: One thousand times smaller…
As if it weren’t bad enough that clueless environmental authorities try to impose their ignorance on the field by using so-called “metric” units of gas concentration, another trap may be lurking for you. Everyone around the world agrees that a part-per-million (ppm) equals 10-6. Unfortunately, since everyone around the world does not agree with what…
This is a follow-up to our earlier article on Using Common Sense and Science in Expressing Gas Concentrations, inspired by a real-life adventure of one of our sales engineers. As our hero was slogging through some e-mail inquiries, he came upon two units of measurement he had not seen before: ppmv and µg/Nm3 ppmv…
Go directly to conversion calculators Early on, in our first chemistry classes, we learn about solutions, and different ways of expressing their concentrations. Since a solution is any homogeneous mixture of two or more substances, gas mixtures are indeed solutions. In the world of gas detection, we tend to be concerned with combustible or toxic…