Gas correction factors are essential for accurately measuring the flow rate of a gas being used in a flowmeter that was calibrated for a different gas. Since different gases have unique properties—such as density and viscosity—applying the right correction factor ensures precise flow readings. Whether adjusting for changes in pressure, temperature, or gas composition, these factors help maintain measurement reliability in industrial and scientific applications.
When a mass flow controller operates with a different gas than the one it was calibrated for, a scale shift will occur in the relation between the output signal and the mass flow rate. This happens due variations in heat capacities or specific heat between the two gases.
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When a variable area flowmeter operates with a different gas than the one it was calibrated for, a correction factor must be used to ensure accurate flow readings.
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