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Handheld Ultrasonic Flow Meter

  • Model:RBFM-H
    • Features
    • Specification
    • Model Selection
    • Applications
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    The RBFM-F-H Handheld/Portable Type Clamp-on Ultrasonic Flow Meter is an ideal for temporary flow measurement applications. It is not necessary to shut down flow or penetrate the pipe in any way when installing and operating this meter. It's a a low cost transit-time ultrasonic flow meter with clamp-on transducers for non-invasive liquid flow rate measurement.

    The RBFM-F-H Handheld/Portable Type Clamp-on Ultrasonic  Flow Meter Features:
    • Transducers for pipe sizes ranging from ½" ~ 240" (15 to 6000 mm)
    • Wide range of fluid velocities - 0.03 ~ ±105 feet/sec. (0.01 ~ ± 32 m/s)
    • Fast response time - less than 1 second
    • High accuracy - ±1% of reading
    • 2 line LCD display with flow rate, totalizer & diagnostics
    • Small sized (8.25" x 3.50" x 1.48") and lightweight (≈1 lb.)
    • Long-life Ni-MH battery for up to 15 hours of continuous operation
    • Clamp-on transducers feature integral magnet for installation on metal pipe without use of a mounting belt or with frame for optional
    • Data logger function includes date, totalizer, & signal condition diagnostic

    Customers always ask these questions:
    1. What's Transit-time ultrasonic flow meter principle?
    ANS:  Ultrasonic flow meters measure the difference of the transit time of ultrasonic pulses propagating in and against flow direction. This time difference is a measure for the average velocity of the fluid along the path of the ultrasonic beam. By using the absolute transit times both the averaged fluid velocity and the speed of sound can be calculated.

    Using the two transit times:

    where  v is the average velocity of the fluid along the sound path and c is the speed of sound.

    2. How to correctly select Ultrasonic flow meter?
    • What is the size of the pipe?
    • What is the fluid?
    • Is the pipe always full?
    • Does the liquid have particulates of 100 ppm of 100 microns in size?
    • Do you require a handheld or continuous process monitor?
    • What is the minimum,normal and maximum flow rate for the flow meter?
    • What is the minimum and maximum process temperature?
    • What is the minimum and maximum process pressure?
    • Do you require an analog output?





    The RBFM-F-H Handheld/Portable Clamp-on Type Ultrasonic Flow Meter Specification:

    Transmitter

    Power Supply

    3 AAA Ni-H built-in batteries. When fully recharged it will last over 12 hours of operation. 90-240VAC for the charger

    Velocity

    0 ~ ±40 ft/s (0 ~±12m/s), bi-directional

    Display

    2 line×10 English letters LCD back lit, can display total flow, flow rate, velocity and meter running status etc. 

    Units

    Rate

    Totalized

    User Configured (English and Metric);

    Rate and Velocity Display;

    (FWD, NET, REV or BATCH) gallons, ft³, barrels, lbs, liters, m³,kg

    Output

    4-20mA; Pulse, Relay, RS485, options: up to 64 GB Data logger

    Input

    3* 4-20mA

    2*Pt100 3 wires can measure Heat

    Accuracy

    ±1.0%~2.0% of reading at rates >0.5 m/s

    ±2.0% of reading at rates <0.5 m/s

    Sensitivity

    Flow Rate: 0.001ft/s (0.0003m/s)

    Repeatability

    0.2% of reading

    Security

    Keypad lockout, access code enable

    Dimensions and Weight

    100×204×34  Weight: <0.6kg

    Transducer

    Liquid Types Supported

    Virtually most any liquid containing less than 2% total suspended solids (TSS) or aeration

    Suited Liquid Temperature

    Std. Temp. Transducer: -40℃~160℃

     

    Dimensions and Weight

    S: Size:42×25×25; weight:<0.3kg

    M: Size:60×43×43; weight:<0.6kg

    L: Size:80×53×53; weight:<1.0kg

    Pipe Size

    Transducer without Frame

    S transducer: DN15-100

    Std M transducer: DN50-700

    L transducer: DN300-6000

    Transducer with Frame

    S transducer: DN15-100

    Std M transducer: DN50-300

    Data Logger

    Optional


    The RBFM-F-H Ultrasonic Flow/Heat Meter Model Selection

    RBFM 

    X

     

    X

    X

    DNxx

    X

    X

     

    X

    X

    X

     

     

    Instrument Type

     

     

    F

       Ultrasonic Flowmeter

    H

        Ultrasonic Heat meter

     

    Power supply

    A

    220VAC

    D

    24VDC

    B

    Battery

     

    Flow/Heat meter Type

     

    F

    Fixed type

    H

    Handheld type

    F

    Flanged type

    B

    Battery type

     

      

      

      

    Transducer Type

     

     

    SN

    S type(pipe size: 15-100mm, temp.: -30 to 90℃)

    SH

    S type(pipe size: 15-100mm, temp.: -40 to 160℃)

    SPMN

    S type with mounting frame only for Handheld (pipe size: 15-100mm, temp.: -40 to 90℃)

    SPMH

    S type with mounting frame only for Handheld(pipe size: 15-100mm, temp.: -40 to 160℃)

    MN

    M Type(pipe size: 50-700mm, temp.: -30 to 90℃))

    MH

    M Type(pipe size: 50-700mm, temp.: -40 to 160℃))

    MPMN

    M type with mounting frame only for  Handheld (pipe size: 50-300mm, temp.: -40 to 90℃)

    MPMH

    M type with mounting frame only for Handheld (pipe size: 50-300mm, temp.: -40 to 160℃)

    RB-1

    extended the mounting frame, for pipe:DN300-700mm, temp.: -40 to 90℃

    RBH

    extended the mounting frame, for pipe:DN300-700mm, temp.: -40 to 90℃

    LN

    L type(pipe size: 300-6000mm, temp.: -30 to 90℃)

    LH

    L type(pipe size: 300-6000mm, temp.: -40 to 160℃)

    I

    Insertion Type

    IE

    Extended type

    F

    Flanged type

     

    Pt100

    Temperature sensor

     

     

    DNxx

    Pipe size

      

     

     

    Pipe material

      

     

    C

    Carbon Steel

    SS

    Stainless Steel

    CI

    cast iron

    F

    Fibreglass

    P

    PVC

    C

    cement pipe

    X

    Others,  clarify

     

    X

    Pressure(MPa)

     

     

    Output

     

    N

    NO

    A

    4-20mA

    P

    Pulse

    R

    Relay

    2

    RS232

    4

    RS485

    5

    Datalogger

     

    Input

     

    N

    NO

    1

    1*4-20mA

    2

    2*4-20mA

    3

    3*4-20mA

     

    Cable length

    X

    meter



    The RBFM-F-H Handheld/Portable Clamp-on Type Ultrasonic Flow Meter Applications:
    • Building Services/Energy Management: HVAC, energy measurement system   
    • Chemicals, including alcohol, acids, etc
    • Beverage, food and pharmaceutical processors
    • Petroleum products   
    • Agriculture irrigation metering 
    • Utilities monitoring: Water (hot water, cooling water, De-ionized water, potable water)
    • Power+Energy: water flow, cooling water, etc.