Atmospheric Pressure Corrections on Interscan Instruments

Atmospheric Pressure Corrections on Interscan Instruments When a gas concentration is measured or reported, we may talk in terms of ppm, but in reality we are measuring the partial pressure of the gas. (Refer to Dalton’s Law of Partial Pressures) Thus, any instrument reading is going to be affected by changes in ambient pressure. It…

Using Common Sense and Science in Expressing Gas Concentrations

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…