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…

Minimum Detectability

Minimum Detectability” is one of those instrumentation terms that is used frequently, but is seldom defined. Indeed, even though you will encounter this term on many data sheets, its definition does not appear in any of the usual learned references, including Process Instrumentation Terminology, ANSI/ISA—51.1—1979(R1993) and Standard Terminology Relating to Sampling and Analysis of Atmospheres,…