Measured variablesMass flow rate, volumetric flow s. c. (standard condition), volumetric flow a. c. (actual condition), molecular weight, gas volume and mass, gas velocity, sound velocity
Measuring range0,03 m/s ... 120 m/s (0.1 ft/s ... 394 ft/s)
Measured variablesVolumetric flow a. c., volume a. c., gas velocity, Speed of sound, optional volume correction via integrated, electronic volume corrector (EVC)
Measuring MediumNatural gas (with up to 30% hydrogen), air, natural gases containing increased levels of CO2, N2, H2S, O2, H2
Nominal pipe size3 ″ ... 56 ″ (DN 80 ... DN 1400), other nominal pipe sizes on request
Max. measurement errorVolume flow (standard): ‐ ±1.0 % o.r. for 3 to 40 m/s (9.84 to 131.23 ft/s) ‐ ±2 % o.r. for 0.3 to 3 m/s (0.98 to 9.84 ft/s) Volume flow (optional calibration): ‐ ±0.5 % o.r. for 3 to 40 m/s (9.84 to 131.23 ft/s) ‐ ±1.0 % o.r. for 0.3 to 3 m/s (0.98 to 9.84 ft/s) Corrected volume flow (standard): ‐ ±1.5 % o.r. for 3 to 40 m/s (9.84 to 131.23 ft/s) ‐ ±2.5 % o.r. for 0.3 to 3 m/s (0.98 to 9.84 ft/s) Corrected volume flow (optional calibration): ‐ ±1.0 % o.r. for 3 to 40 m/s (9.84 to 131.23 ft/s) ‐ ±1.5 % o.r. for 0.3 to 3 m/s (0.98 to 9.84 ft/s) Sound Velocity: ±0.2 % o.r.
Measuring rangeGas: 0.3 m/s to 40 m/s
Medium temperature range-50 to 150 °C (-58 to +302°F) -50 to 100 °C (-58 to +212°F) with integrated pressure cell
Max. process pressure0.7 to 101 bar a (10.15 to 1464.88 psi a)
Measured variablesVolume a. c., volumetric flow a. c., gas velocity, volume s. c. (*), volume flow under s.c. (*) (*) additional function included with integrated volume correction
Measured variablesVolume a. c., volumetric flow a. c., gas velocity, volume s. c. (*), volume flow under s.c. (*) (*) additional function included with integrated volume correction
Number of applicationsSupport up to 4 gas runs or 2 liquid runs per module (Flow-X/M, Flow-X/C)
Inputs6x analog transmitter input, high accuracy Input types are 4 to 20 mA, 0 to 20 mA, 0 to 5 V, 1 to 5 V Accuracy mA inputs; 0.002% FS at 21 °C, 0.008% at full ambient range of 0-60 °C, long-term stability 0.01% per year Resolution: 24 bits. Analog inputs have the same earthing relative to all other electronic devices.
16x digital status inputs. Resolution 100ns (10MHz)
Outputs4x analog output for process outputs and flow / pressure control. Resolution 14 bits, 0.075% FS. Analog outputs share same ground floating in relation to all other electronics.
16x digital output, open collector. Rating 100mA @24V
Max. measurement errorVolume flow (standard): ‐ ±1.5 % o.r. for 3 to 30 m/s (9.84 to 98.4 ft/s) ‐ ±3 % o.r. for 1 to 3 m/s (3.28 to 9.84 ft/s) Volume flow (option): ‐ ±0.1 % o.f.s. for 0.3 to 1 m/s (0.98 to 3.28 ft/s) ‐ ±1.5 % o.r. for 1 to 30 m/s (3.28 to 98.4 ft/s)
Measuring rangeStandard: 1 to 30 m/s (3.28 to 98.4 ft/s) Option: 0.3 to 30 m/s (0.98 to 98.4 ft/s)
Medium temperature range0 to +80 °C (+32 to +176 °F)
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Using ultrasonic waves, the flow volume of a wide variety of gases and liquids can be measured reliably – independent of electrical conductivity, pressure, temperature or viscosity. In applications that require traceable and guaranteed accuracy, inline ultrasonic sensors are preferred for use. Clamp-on ultrasonic sensors, on the other hand, are installed on the outer wall of the pipe and thus also enable temporary measurements or a retrofitting.
For retrofitted installation without interrupting the process
Aggressive fluids can be measured without any problems, even under high pressure
Suitable for pipes made of plastic, steel, cast iron composite materials (lined/unlined)
For pipe diameters up to DN 4000 (156")
In-line sensors
Guaranteed accuracy thanks to traceable factory calibration
Robust industrial design in accordance with ASME and EN
Short inlet runs
For pipelines up to DN 300 (12")
The Ultrasonic Flow Measuring Principle
Custody transfer ultrasonic LNG metering with FLOWSIC
Ultrasonic flow 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.
Benefits
Measurement independent of pressure, density, temperature, conductivity 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
In-line or clamp-on design for stationary or temporary flow measurements
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Flow measuring technologies for liquids, gases and steam
Products and services of our flow measuring technologies for liquids, gases and steam at a glance
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Advantages of clamp-on flowmeters in industrial processes
For maximum flexibility: Clamp-on flowmeters for noninvasive measurements without process interruptions –maintenance-free for a lifetime and many other advantages
%20with%20flange%20connections%20for%20accurate%20measurement%20of%20natural%20and%20process%20gas%20-%20PP01.jpg "Picture of ultrasonic flowmeter Proline Prosonic Flow G 300 / 9G3B - Highly robust gas specialist")
%20with%20flange%20connections%20for%20energy%20management%20of%20water%20across%20all%20industries%20-%20PP01.jpg "Picture of Ultrasonic flowmeter Prosonic Flow E Heat (DN50 / 2\") for water energy management")
