General Questions and Answers

What is meant by PPM in gas dection?

Parts per million (PPM) is a commonly used unit of concentration for small values. One part per million is one part of solute per one million parts solvent or 10^-6 parts. One PPM is like.. one inch in 16 miles or one second in 11.5 days or one minute in two years or one car in bumper-to bumper traffic from Cleveland to San Francisco.