RBBF Handheld Type Clamp-on Ultrasonic Water Flow Meter is a Handheld or Portable , low cost transit-time ultrasonic flow meter with clamp-on transducers for non-invasive liquid flow rate measurement. Our microprocessor-based, user friendly field programmable creates no interruption of the process flow and has low installation costs.
The RBFM transit-time water flow meter utilizes two transducers that function as both ultrasonic transmitters and receivers. The transducers are clamped on the outside of a closed pipe at a specific distance from each other. The transducers can be mounted in V-method where the sound transverses the pipe twice, or W-method where the sound transverses the pipe four times, or in Z-method where the transducers are mounted on opposite sides of the pipe and the sound crosses the pipe once. This selection of the mounting method depends on pipe and liquid characteristics. The flow meter operates by alternately transmitting and receiving a frequency modulated burst of sound energy between the two transducers and measuring the transit time that it takes for sound to travel between the two transducers. The difference in the transit time measured is directly and exactly related to the velocity of the liquid in the pipe, show as follows:
Figure 1
Where:
M is the travel times of the ultrasonic beam
D is the pipe diameter
T up is the time for the beam from upstream transducer to the downstream one
T down is the time for the beam from downstream transducer to the upstream one
ΔT=Tup –Tdown
RBBF Handheld/Portable Type Clamp-on Ultrasonic Water Flow Meter Features:
RBBF 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 |
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Velocity |
0 ~ ±40 ft/s (0 ~±12m/s), bi-directional |
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Display |
2 line×10 English letters LCD back lit, can display total flow, flow rate, velocity and meter running status etc. |
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Units Rate Totalized |
User Configured (English and Metric); Rate and Velocity Display; (FWD, NET, REV or BATCH) gallons, ft³, barrels, lbs, liters, m³,kg |
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Output |
4-20mA; Pulse, Relay, RS485, options: up to 64 GB Data logger |
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Input |
3* 4-20mA 2*Pt100 3 wires can measure Heat |
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Accuracy |
±1.0%~2.0% of reading at rates >0.5 m/s |
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±2.0% of reading at rates <0.5 m/s |
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Sensitivity |
Flow Rate: 0.001ft/s (0.0003m/s) |
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Repeatability |
0.2% of reading |
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Security |
Keypad lockout, access code enable |
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Dimensions and Weight |
100×204×34 Weight: <0.6kg |
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Transducer |
Liquid Types Supported |
Virtually most any liquid containing less than 2% total suspended solids (TSS) or aeration |
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Suited Liquid Temperature |
Std. Temp. Transducer: -40℃~160℃
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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 |
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Pipe Size |
Transducer without Frame |
S transducer: DN15-100 Std M transducer: DN50-700 L transducer: DN300-6000 |
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Transducer with Frame |
S transducer: DN15-100 Std M transducer: DN50-300 |
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Data Logger |
Optional |
RBFM Ultrasonic Flow/Heat Meter Model Selection
RBFM |
X |
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X |
X |
DNxx |
X |
X |
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X |
X |
X |
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Instrument Type |
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F |
Ultrasonic Flowmeter |
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H |
Ultrasonic Heat meter |
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Power supply |
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A |
220VAC |
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D |
24VDC |
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B |
Battery |
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Flow/Heat meter Type |
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F |
Fixed type |
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H |
Handheld type |
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F |
Flanged type |
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B |
Battery type |
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Transducer Type |
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SN |
S type(pipe size: 15-100mm, temp.: -30 to 90℃) |
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SH |
S type(pipe size: 15-100mm, temp.: -40 to 160℃) |
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SPMN |
S type with mounting frame only for Handheld (pipe size: 15-100mm, temp.: -40 to 90℃) |
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SPMH |
S type with mounting frame only for Handheld(pipe size: 15-100mm, temp.: -40 to 160℃) |
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MN |
M Type(pipe size: 50-700mm, temp.: -30 to 90℃)) |
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MH |
M Type(pipe size: 50-700mm, temp.: -40 to 160℃)) |
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MPMN |
M type with mounting frame only for Handheld (pipe size: 50-300mm, temp.: -40 to 90℃) |
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MPMH |
M type with mounting frame only for Handheld (pipe size: 50-300mm, temp.: -40 to 160℃) |
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RB-1 |
extended the mounting frame, for pipe:DN300-700mm, temp.: -40 to 90℃ |
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RBH |
extended the mounting frame, for pipe:DN300-700mm, temp.: -40 to 90℃ |
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LN |
L type(pipe size: 300-6000mm, temp.: -30 to 90℃) |
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LH |
L type(pipe size: 300-6000mm, temp.: -40 to 160℃) |
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I |
Insertion Type |
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IE |
Extended type |
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F |
Flanged type |
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Pt100 |
Temperature sensor |
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DNxx |
Pipe size |
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Pipe material |
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C |
Carbon Steel |
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SS |
Stainless Steel |
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CI |
cast iron |
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F |
Fibreglass |
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P |
PVC |
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C |
cement pipe |
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X |
Others, clarify |
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X |
Pressure(MPa) |
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Output |
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N |
NO |
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A |
4-20mA |
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P |
Pulse |
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R |
Relay |
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2 |
RS232 |
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4 |
RS485 |
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5 |
Datalogger |
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Input |
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N |
NO |
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1 |
1*4-20mA |
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2 |
2*4-20mA |
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3 |
3*4-20mA |
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Cable length |
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X |
meter |
RBBF Handheld/Portable Clamp-on Type Ultrasonic water Flow Meter Applications:
Magmeters
Ultrassonic Flow Meter
Coriolis, Thermal Mass Flow Meter
Other Process Instrument