High Resolution Transit Time Ultrasonic Flowmeter For Phase Difference

MOQ： 1Set
Price： Negotiable
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Payment Terms	L/C,D/A,D/P,T/T
Supply Ability	100PCS/Month
Delivery Time	5-8 work days
Packaging Details	Carton
Communication Protocols	Modbus, HART, Profibus
Measurement Principle	Ultrasonic transit-time or Doppler effect
Output	4-20mA,LCD Display,RS485
Protection Rating	IP65 or higher
Pipe Size Range	1"~48" (25mm ~ 1200mm)
Pipe Size	DN15mm-6000mm
Humidity	Up to 99% RH,non-condensing
Data Storage	SD card or internal storage
Installation Type	Clamp-on, Insertion, or Inline
Power Supply	24 VDC，220V AC
Brand Name	QINWEIYB
Model Number	QWLW-GY213
Place of Origin	China

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Product Specification


Payment Terms	L/C,D/A,D/P,T/T	Supply Ability	100PCS/Month
Delivery Time	5-8 work days	Packaging Details	Carton
Communication Protocols	Modbus, HART, Profibus	Measurement Principle	Ultrasonic transit-time or Doppler effect
Output	4-20mA,LCD Display,RS485	Protection Rating	IP65 or higher
Pipe Size Range	1"~48" (25mm ~ 1200mm)	Pipe Size	DN15mm-6000mm
Humidity	Up to 99% RH,non-condensing	Data Storage	SD card or internal storage
Installation Type	Clamp-on, Insertion, or Inline	Power Supply	24 VDC，220V AC
Brand Name	QINWEIYB	Model Number	QWLW-GY213
Place of Origin	China
High Light	High Resolution Ultrasonic Flowmeter ，Transit Time Ultrasonic Flowmeter ，Transit Time Ultrasonic Flow Meter

Phase Difference Measurement For High-Resolution Ultrasonic Phase Shift Flowmeter

The ultrasonic phase shift flowmeter is an instrument that calculates the flow velocity and flow rate of a fluid by detecting the phase difference of ultrasonic signals when they propagate in the downstream and upstream directions.

Core Features

Extremely high resolution and low flow velocity sensitivity: This is its most prominent advantage. Due to the amplification effect of high frequency (MHz), it is highly sensitive to minute changes in flow velocity and can measure extremely low flow velocities (down to the order of 0.001 m/s), with a very low lower limit of measurement range.
High theoretical accuracy: The phase measurement technology is highly mature and can achieve very high accuracy.
Strong anti-interference ability: Phase information is less affected by signal amplitude attenuation, and it is more tolerant of bubbles and particles than the amplitude-dependent beam deflection method, but not as robust as the time difference method.
Relatively straightforward signal processing.

Comparison with Other Ultrasonic Flowmeters

Characteristics	Phase Shift Ultrasonic Flowmeter	Standard Time Difference Ultrasonic Flowmeter	Correlation Ultrasonic Flowmeter
Measurement Object	Phase Difference (Δφ)	Time Difference (Δt)	Randomly Marked Transmission Time (τ)
Core Advantages	High sensitivity at low flow rates and high resolution.	Balance between wide range, accuracy and robustness.	Insensitive to changes in medium sound velocity, suitable for complex fluids.
Low Flow Rate Performance	Excellent.	Generally good (limited by time measurement resolution).	Depends on the concentration of markers, usually good.
Upper Range Limit	Limited by phase ambiguity, relatively narrow.	Very wide.	Relatively wide.
Medium Adaptability	Clean, homogeneous single-phase flow.	Clean to slightly impure single-phase flow.	Non-homogeneous, multiphase flow.
Typical Accuracy	High (±0.5% to ±1% within the range).	High (±0.5% to ±1%).	Relatively high (±0.5% to ±1.5% under applicable medium conditions).

Typical application scenarios

Blood flow measurement: In medical equipment, it measures the blood flow velocity in human blood vessels or extracorporeal circulation pipelines.
Micro-flow measurement and laboratory research: Microfluidic chips, chemical reactors, and small-flow calibration devices in laboratories.
High-precision water flow standard device: As a transfer standard or comparison standard, it provides high-precision calibration for other flowmeters in the low-flow range.
Special industrial processes: Precise control and measurement of small flows of lubricating oil, hydraulic oil, and expensive chemical reagents.

The ultrasonic phase shift flowmeter is a model of the pursuit of "ultimate resolution" and "low flow rate detection capability" in ultrasonic flow measurement technology. It ingeniously converts the "time difference - phase difference" to amplify the hard-to-capture tiny time signals into phase signals that are easy to measure precisely.

Company Details

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Manufacturer,Distributor/Wholesaler,Exporter 
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Total Annual:

5 million-10 million
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Employee Number:

500~800 
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Xi 'an Qinwei Instrument Factory (General Partnership Enterprise)
No. 143, Sanqiao Street, Xi'an City, Shaanxi Province, China
https://www.radarlevelgauges.com/

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