Introduction -- Composition and quality -- Physical properties and process conditions -- Measurement concepts -- Orific flowmeter -- Ultrasonic flowmeter -- Turbine flowmeter -- Rotary displacement flowmeter -- Calculations -- Secondary and tertiary devices -- Electronic gas measurement -- Uncertainty -- Measurement system design -- Orifice flowmeter design -- Ultrasonic flowmeter design -- Turbine flowmeter design -- Rotary displacement flowmeter design -- Inspection, testing, verification, calibration, and certification -- Standards, publications, and regulations.