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DF868 Fixed-installation Ultrasonic Liquid Flowmeter

GE Panametrics’ Transit-Time mode, with advanced signal coding and correlation detection methods, provides drift-free flow measurements in ultraclean to dirty liquids. This mode handles 80 percent of multiphase liquids-including fluids with gas bubbles, liquid droplets and entrained solids-that previously required Doppler-type meters because conventional transit-time meters failed. Using advanced technology available only from GE Panametrics, an innovative TransFlection mode expands the DF868 flowmeter’s measuring capabilities to include applications previously handled only by Doppler meters, such as raw sewage, sludge, slurries and other extremely attenuating multiphase fluids. An optional dual-channel/dual-path model can be configured for a variety of uses including flow measurement in two different pipes, leak detection by measuring at two different locations on the same pipe and dual-path measurement at one location for maximum accuracy.

Obstructionless wetted transducers are readily available for maximum performance. After proper installation, transit-time accuracies of better than one percent are achievable in most applications, matching the performance of factory-calibrated meters or meters using expensive spoolpieces. Measurement range is 0.1 to 40 ft/s (0.03 to 12.2 m/s) for a turndown ratio of 400 to 1 in pipes from ½ to more than 200 in (1.27 cm to 5.1 m) in diameter. Measurement is noncontaminating, obstructionless, and causes no pressure drop. The DF868 is all-digital so measurements don’t drift, and with no moving parts to wear out or orifices to clog, it never needs regular maintenance.