Sage Metering has released a new paper, “Fundamentals of Thermal Mass Flow Measurement,” explaining why you don’t need pressure and temperature correction when measuring with thermal mass flow meters.
As the manufacturer of Sage Metering thermal mass flow meters, we are often asked, “Why do I need to measure mass flow? What is the difference between actual cubic feet per minute (ACFM) and standard cubic feet per minute (SCFM)? What is the theory of thermal mass flow quantification? Why are pressure and temperature correction not required when using a thermal mass meter? What are the common applications for using a thermal mass flow meter?”
We take on these questions and more in our white paper. Visit “Fundamentals of Thermal Mass Flow Measurement” to read the HTML version of the document, or download the PDF.
Why are pressure and temperature correction not required?
The short and sweet answer is that since gas is compressible, its volume changes under pressure or when heated (or cooled). When using a thermal mass flow meter, measurement is based on heat transfer and measures mass flow, not volumetric flow, and does not require temperature or pressure correction.