Dynasonics division of Racine Federated, Inc. developed a Doppler Ultrasonic Flow Meter that uses digital technology to improve performance and ease of use. The Series DFX Flow Meter’s software algorithms monitor incoming signal quality and flow meter performance. To simplify the initial installation and ongoing operation, the software makes automatic adjustments that nullify changing liquid conditions. Without special tools, training, or specialized computer software, the product can be installed and measuring flow within minutes. The software automatically adjusts filtering parameters and gain settings for reliable readings over a wide range of liquid and reflector conditions. Digital mixer circuitry in the unit is highly immune to measurement errors caused by electrical noise and other ultrasonic products. Housed in a NEMA 4X (IP-66) enclosure, the DFX is user-configurable via the front keypad with a backlit LCD display providing auto-ranging rate and accumulated flow values.
The meter works with either a non-intrusive or direct liquid contact transducer. For use on most pipes constructed from metal or plastic, the Series DT9 clamp-on, non-intrusive transducer is rated to NEMA 6P (IP-68) and operates with fluid temperatures up to 400F (200C). For pipe systems that do not permit ultrasound penetration, the Series DP7 probe transducer inserts into the pipe wall and directly contacts the liquid. Utilizing RG59 coaxial cable, both transducer types can be located up to 990 feet (300 meters) from the DFX display enclosure.
Dynasonics engineers designed the flow sensor system to measure flow in full pipes carrying liquids such as sludges, slurries, emulsions, dispersions, and pulps that typically have suspended solids or gas bubbles greater than 35 micron and provide effective sonic reflectors. The sensor measures flow on pipe sizes larger than 1/8 inch [3 mm] and flow rates from 0.15 to greater than 30 ft/sec [0.05 to greater than 9 m/sec].
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