Ultrasonic Liquid Flowmeter

The DF868 Ultrasonic Liquid Flowmeter is a fixed-installation meter based on the company's TransPort PT868 Portable Ultrasonic Liquid Flowmeter. The new device is available with two built-in measuring modes. The company's transit-time mode provides drift-free flow measurements in ultra-clean to dirty liquids. This mode handles 80% of the multiphase liquids including fluids with gas bubbles, liquid droplets and entrained solids that previously required Doppler-type meters. A new, innovative TransFlection mode expands the device's measuring capabilities even further. This includes the more difficult applications previously handled only by Doppler meters, such as raw sewage, sludge, slurries and other extremely attenuating multiphase fluids.

Also available, the optional dual-channel/dual-path model can be user-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.

Other standard features are the built-in energy flow-measuring capability, using clamp-on or wetted RTDs; two independent user-programmable graphic LCDs, allowing simultaneous display of numerical flow data, logged data, real-time flow graphs or diagnostic waveforms; and a built-in 40,000 point datalogger.

Using clamp-on flow transducers, the device measures flow rate through metal, plastic or even concrete-lined pipes without penetrating the pipe wall. Obstructionless wetted transducers are available for maximum performance. After proper installation, transit-time accuracies of better than 1% are achievable in most applications. Measurement range is 0.1 to 40 ft/s for a turn-down ratio of 400 to 1 in pipes from ½" to over 200" in diameter. Measurement is non-contaminating, obstructionless and causes no pressure drop. The device is digital so measurements don't drift.

Panametrics, Inc., 221 Crescent Street, Waltham, MA 02453. Tel: 781-899-2719; Fax: 781-894-8582.