Area Velocity Measurement Portable Clamp-on Ultrasonic Doppler Flow Meter for Waste Water

Product Description

Area Velocity Measurement Portable Clamp-On Ultrasonic Doppler Flow Meter For Waste Water

      The HG-DAVM-UDFM Area Velocity Flow Meter Is Designed For Applications In Full Or Partially Full Pipes 150 – 6000 Mm (6-240 Inches) In Diameter, Or Open Channels With Flow Widths 200-10000mm (8-400 Inches) And Depths Of 20-10000mm (3/4-400 Inches). Lt Uses Advanced Doppler Profiling Technology To Directly Measure Velocity Profiles Making It The Best Choice For Sites With Nonuniform, Rapidly Changing, Backwatered, Near-Zero, Negative Or Reverse Flow Conditions.

      This Eliminates The Need For Onsite Calibration, Thereby Reducing Significantly The Cost Of Installation. Used In Conjunction With An Integral Upward-Looking Ultrasonic Or A Secondary External Pressure Sensor (Optional) For Determining The Depth, The Meter Uses A Numerical Model For Averaged Velocity In The Entire Cross-Section And The Continuity Equation To Calculate Flow. Information On The Level, Velocity, Flow, Temperature, Conductivity, And Position Offset Can Be Taken From The Transmitter/Flow Computer Or Directly From The Sensor. This Meter Will Log Up To 16Gb Of Data. In Addition, The Flow Meter Can Control A Sampler In A Flow-Proportional Sampling Mode By Means Of Pulse Output.

Advantages:

Cost-Effective: The Single-Sensor Design Makes It An Economical Choice.
Easy Installation: Designed For Quick And Straightforward Setup.
Versatile Display Options: Available In Both Fixed-Install And Portable Configurations.

Doppler Open Channel Measurement:
HG-DAVM-UDFM Is A Versatile Open-Channel Flow Meter Utilizing Doppler Technology For Velocity Measurement, Combined With An Integrated Hydrostatic Level Measurement Transducer. This Dual-Functionality Allows For Accurate Tracking Of Fluid Velocity And Determination Of The Cross-Sectional Area Of The Flow.
 
Key Features and Functionality:
* Doppler Transducer: Essential For Tracking Fluid Velocity In Channels With Particles Or Gas Bubbles.
* Hydrostatic Level Transmitter: Works In Tandem With The Doppler Transducer To Calculate The Flow Area.
* Suitability: Ideal For Sewer And Open Channel Applications With Sizes From 3-15 Feet (1-5 Meters) And Higher Solids Content.

Specification

Applications:

01. Area Velocity Flow Meters: Water Resource Management

02. Open Channel Flow Meter: Stormwater and Drainage Systems

03. Doppler Open Channel Flow Meter: Industrial Effluent Measurement
04. Area Velocity Open Channel Meter: Agricultural Irrigation Systems

Technical Features:

01. Non-Intrusive Measurement for Easy Maintenance: Utilizing Microwave Doppler With Radar Level Transmitter Our Alsonicravm Meters Measure Open Channel Flow Without Ever Touching The Liquid To Reduce Fouling, Wear, And Ongoing Maintenance.

02. Ideal For Partially Filled Channels: Perfect For Canals, Streams, And Sewer Systems, These Meters Accurately Calculate Flow In Trapezoidal, Rectangular, And Custom-Shaped Channels.

03. Customizable for Harsh Environments: Built With Flexible Sensor Options And Rugged Enclosures, These Meters Perform Reliably In Outdoor, Corrosive, Or Hazardous Locations.

Technical Specifications

Type	Variable Area Flowmeters	Medium	Water
Accuracy	+/-1%	Place of Origin	Hefei City Anhui Province China
Connectivity	Portable Doppler Flow Meter	Housing Material	SS 316L + ABS
Measurement Range	0.02-10 m/s	Model	HG-DAVM-UDFM Doppler Ultrasonic Flow Meter Submersible Doppler Velocity Sensor
Customized Support	OEM, ODM, OBM, Software Reengineering	Warranty	One Year
Power Supply	DC 10-15V	Working Current	DC10-15V 80-180mA@12V (Bidirectional Measurementnon-Low Power Version)
Sound Frequency	2MHz	Temperature	Range:-10°C-60°C   Accuracy:      ±1°C
Flow Rate	Range:0.03m-5m/s   Accuracy:±1.0%±lcm/s	Water Level	Range:0.03m-5m (Customizable 10m) Accuracy:0.3%±0.5cm
Instantaneous Flow Range	0-99.99m3/s	Accumulated Flow Range	0.1-999999m3

Drawing & Dimension

Detail Images

FAQ

Q: What Are Open Channel Flow Meters ?

A: Open Channel Flow Meters Are Specialized Instruments Designed To Measure The Flow Of Liquids In Channels, Streams, Or Partially Filled Pipes Where The Flow Is Not Under Pressure. Unlike Traditional Closed-Pipe Meters, They Determine Flow Rate By Calculating Both The Liquid Level And Velocity Using Separate Sensors. Typically Ultrasonic Or Electromagnetic For Velocity, And Any Level Technologies, For Level Measurement.

   These Meters Rely On Area-Velocity Measurement (AVM), Combining Data From Both Sensors And A Flow Computer To Provide Accurate, Real-Time Flow Profiling. Open Channel Flow Meters Are Ideal For Applications Like Wastewater Treatment, Irrigation Systems, And Stormwater Monitoring.              Compared To Outdated Flumes And Weirs, Which Degrade And Collect Sediment Over Time, Modern Open Channel Meters Offer Far Greater Accuracy And Long-Term Reliability Without Relying Solely On Channel Shape.

Q: How Open Channel Flow Meters Work ?

A: Area Velocity Flow Meters Differ From Other Types By Combining A Velocity Sensor With An Ultrasonic Level Sensor To Calculate The Flow Rate. This Technology Offers Several Advantages For Certain Applications, Such As:
 
* Accurate Flow Measurement In Partially Filled Pipes Or Channels With Irregular Shapes
* Ability To Handle A Wide Range Of Flow Rates And Velocities
* Reduced Installation Costs Compared To Flumes Or Weirs

Open Channel Flow Meters Rely On Two Key Measurements To Determine The Flow Rate:
 
* Liquid Level: The Height Of The Liquid Surface In The Channel
* Velocity: The Average Speed Of The Liquid Flowing Through The Channel

By Multiplying The Cross-Sectional Area Of The Flow (Calculated Using The Liquid Level And Channel Dimensions) With The Average Velocity, The Flow Meter Can Accurately Compute The Volumetric Flow Rate Using The Following Equation: Flow Rate (Q) = Cross-Sectional Area (A) * Average Velocity (V) Several Technologies Are Employed In Open Channel Flow Meters To Measure Liquid Level And Velocity:
 

Several Technologies Are Employed In Open Channel Flow Meters To Measure Liquid Level And Velocity:

1) Velocity Measurement Doppler Ultrasonic:
    * Suitable For Opaque Fluid.
    * Ultrasound Pulses Are Transmitted Into A Liquid, And Flow Velocity Profile Is Found And The Flow Rate Is Measured By Using The Characteristics That Doppler Frequency Of The Echo From Reflectors Such As Air Bubbles And Particles In The Liquid Changes According To Flow Velocity.
 
2) Velocity Measurement Transit-Time Ultrasonic:
    * Fluid Velocity Is Measured By Sending An Ultrasonic Pulse From An Upstream Transducer To A Downstream Transducer And Back Again. These Signals Are Emitted Alternately In The Flow Direction And Against It. As The Fluid In Which The Signals Propagate Is Flowing, The Transit Time Of The Ultrasonic Signals In The Flow Direction Is Shorter Than Against The Flow Direction.

    * The Resulting Difference In Transit Time, Is Measured And Allows The Flowmeter To Determine The Average Fluid Velocity Along The Propagation Path Of The Ultrasonic Signals. A Flow Profile Correction Is Then Performed In Order To Obtain The Area Averaged Flow Velocity, Which Is Proportional To The Volumetric Flow Rate Based On User-Entered Information About The Process Application.
    * Ultrasound Pulses Are Propagated In An Angle Both From The Upstream And Downstream, And Flow Rate Is Measured By Detecting The Time Difference Generated With The Flow.
    * Suitable For Clean Fluid 

3) Level Measurement Radar:

   Level Measurement Using Radar Technology Is Based On The Reflection Of Microwaves On Surface Media. All Media Have A Dielectric Constant. The Higher It Is, The Stronger The Reflection Of The Microwaves Will Be.

   Vacuum Gives No Reflection At All And Has A Dielectric Constant Of Radar Level Transmitters Use Top-Down Waveguides To Generate And Direct Microwave Pulses Downwards Into A Containment Vessel. These Signals Propagate Through The Headspace Due To The Low Dielectric Constant, Or Relative Permittivity (Er), Of Gas And Vapor.