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{"title":"Sectional Ultrasonic Flowmeter Wall Mount Insertion Type Ultrasonic Flow Meter","imgUrl":"https:\/\/img.chinax.com\/nimg\/44\/31\/16d7122d43f926128a6fa8dc476b-200x200-1\/sectional_ultrasonic_flowmeter_wall_mount_insertion_type_ultrasonic_flow_meter.jpg","attrs":{"Installation Method":"Wall Mount","Brand Name":"QINWEIYB","Model Number":"QWLW-GY203","Place of Origin":"China"}}
{"title":"Ultrasonic Open Channel Flowmeter 4-20mA Output IP65 For Non Contact Measurement","imgUrl":"https:\/\/img.chinax.com\/nimg\/bb\/bf\/7e0177408c47eb69467b8ba68418-200x200-1\/ultrasonic_open_channel_flowmeter_4_20ma_output_ip65_for_non_contact_measurement.jpg","attrs":{"Output":"4-20mA,LCD Display,RS485","Name":"Easy Installation Ultrasonic Flowmeter","Power Supply":"24 VDC","Pipe Size Range":"1\"~48\" (25mm ~ 1200mm)"}}
{"title":"The Portable, Non-invasive, Fast And Flexible Measurement Expert - Handheld","imgUrl":"https:\/\/img.chinax.com\/nimg\/c5\/a5\/4d42791bd7a164f12cdd50d78ad9-200x200-1\/the_portable_2c_non_invasive_2c_fast_and_flexible_measurement_expert_handheld_ultrasonic_flowmeter.jpg","attrs":{"Skype":"summer.cao39","Operating Temperature":"-20\u00b0C to 80\u00b0C","Material":"Aluminum alloy or stainless steel housing","Output":"4-20mA,LCD Display,RS485"}}
{"title":"Modular Clamp On Ultrasonic Flowmeter \/ High Temperature Ultrasonic Flow Meter","imgUrl":"https:\/\/img.chinax.com\/nimg\/07\/96\/b2813830e809f66501459bb6b9e9-200x200-1\/modular_clamp_on_ultrasonic_flowmeter_2f_high_temperature_ultrasonic_flow_meter.jpg","attrs":{"Flow Range":"0.01 to 40 m\/s","Pipe Size":"Clamp-on:1\"~48\"(25mm~1200mm)","Transmitter Enclosure":"IP65,ABS\/PC enclosure","Skype":"summer.cao39"}}
{"title":"High Precision Ultrasonic Heat Meter , Remote Transmission Water Meter 4-20mA","imgUrl":"https:\/\/img.chinax.com\/nimg\/d9\/00\/8226a3817feea8b350ec6e589685-200x200-1\/high_precision_ultrasonic_heat_meter_2c_remote_transmission_water_meter_4_20ma.jpg","attrs":{"Transducer":"Encapsulated design,IP68","Output Signal":"4-20mA, Pulse, Frequency, Modbus, HART","Pipe Size":"Clamp-on:1\"~48\"(25mm~1200mm)","Power Supply":"24 V DC or 110\/220 V AC"}}
Applicable To Extremely Complex Medium Correlation Method Ultrasonic Flowmeter
Correlation method ultrasonic flowmeter is a type of ultrasonic flowmeter based on the principle of "cross-correlation analysis".
Core Features
Unaffected by changes in sound speed: This is its greatest advantage. It measures the transmission time of the "pattern" and does not rely on the absolute sound speed of ultrasonic waves in a stationary fluid. Therefore, it is completely unaffected by changes in sound speed caused by variations in fluid composition, temperature, and pressure, ensuring extremely high and stable accuracy.
Applicable to extremely complex media: It can measure almost any heterogeneous fluid, including high-concentration slurries, gas-liquid two-phase flows, liquid-solid two-phase flows, non-Newtonian fluids, viscous liquids, etc. As long as there are detectable random disturbances in the fluid.
Excellent linearity: The flow rate has a strict inverse relationship with the transmission time, resulting in very good measurement linearity.
No moving parts, non-contact/low-contact.
Comparison with the Mainstream "Time Difference Method"
Characteristics
Related Method Ultrasonic Flowmeter
Time Difference Method Ultrasonic Flowmeter
Measurement Object
The transmission time of "randomly marked patterns" in the fluid.
The propagation time difference of the ultrasonic "wave" itself.
Dependence on Sound Speed
Completely independent, immune in principle.
Highly dependent, requires precise measurement and compensation for sound speed changes.
Primarily affected by the accuracy of the sensor spacing L and signal quality.
Affected by multiple factors such as sound speed changes, flow profile, and installation angle.
Cost and Complexity
High.
Moderate (single-channel) to high (multi-channel).
Typical Accuracy
Can reach ±0.5% to ±1.0% (under applicable media).
Can reach ±0.5% or even higher in clean fluids.
Response Time
Slow (seconds).
Fast (milliseconds to seconds).
Typical application scenarios
Mining and metallurgy: Flow measurement of high-concentration ore pulp, tailings pulp, cement slurry, and coal-water mixtures.
Oil and energy: Measurement of three-phase oil, gas, and water flow, heavy oil, and well production fluids.
Chemical and papermaking: Pulp, cellulose pulp, polymer solutions, and high-viscosity chemical raw materials.
Wastewater treatment: Flow control of high-solid-content sludge and digested sludge.
Research and special industries: Complex fluid dynamics research such as fluidized beds, pneumatic conveying, and food slurries.
Correlation ultrasonic flowmeters are the "specialist experts" and "problem solvers" in the field of flow measurement. They bypass the theoretical bottleneck of traditional ultrasonic flowmeters (speed of sound dependency) and take a unique approach by using the "fingerprint" of the fluid itself for measurement.