Flow measuring technology For liquids, gases and steam

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Flow measuring technology for liquids, gases and steam

Ultraschall Ultrasonic flowmeters Proline Prosonic Flow – Whether mounted on the outer wall of the pipe or directly into the pipe: ultrasonic sensors guarantee versatile and economical measurement of gases and liquids up to a nominal diameter DN 4000 (160")

Using ultrasonic waves, the flow volume of a wide variety of gases and liquids can be measured reliably – independent of electrical conductivity, pressure or viscosity. In applications that require traceable and guaranteed accuracy, inline sensors are preferred for use – in petrochemicals and other chemicals as well as in the water industry. Clamp-on ultrasonic sensors, on the other hand, are installed on the outer wall of the pipe and thus also enable temporary measurements. Their spectrum of use ranges from applica- tions in the water industry to industrial process engineering. Clamp-on sensors • For retrofitted installation without process interruption • Aggressive fluids can be measured without any problem, even under high pressure • Suitable for pipes made of plastic, steel, cast iron or composite materials (lined/unlined) • Ideally suited for flow monitoring, network balancing and verification of previously installed devices • High cost-effectiveness with increasing pipe diameter (up to DN 4000/160") Inline sensors • Guaranteed accuracy thanks to traceable factory calibration • Robust industrial design in accordance with ASME and EN • Short inlet runs

Measuring principle Swimming against the flow requires more power and more time than swimming with the flow. This simple fact is the basis for ultrasonic flow measurement according to the “differential transit time” method: This method uses two sensors, set opposite each other in the measuring tube. Each sensor can alternately transmit and receive ultrasonic signals while simultaneously measuring the signal transit time. As soon as the fluid in the tube starts to flow, the signals are accelerated in the direction of flow but delayed in the opposite direction. The differential transit time, measured by the two sensors, is directly proportional to the flow rate. Advantages at a glance • Measurement independent of pressure, conductiv ity and viscosity (for homogeneous fluids) • Free pipe cross-section, no pressure loss • No moving parts, minimum maintenance and upkeep • Long service life, no abrasion or corrosion from the fluid • Inline or clamp-on design for stationary or temporary flow measurements

Measuring principle movie: www.eh.digital/3E6tW4Z