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This document discusses noise reduction in ultrasonic gas flow measurement. It describes how control valves with pressure drops can generate ultrasonic noise that interferes with ultrasonic flow meters. The noise level increases with pressure drop and flow rate through the valve. To reduce noise, the document recommends signal processing techniques like filtering and stacking in the meter, placing the meter upstream of the valve to take advantage of higher pressure, and installing straight pipe or fittings

Author

yasmina

Language

EN