Handheld Clamp-on Ultrasonic Flow Meter

Handheld Clamp-on Ultrasonic Water Flow Meter
  • Handheld Clamp-on Ultrasonic Water Flow Meter

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.

Description

  • Principle
  • Features
  • Specification
  • Model Selection
  • Applicants
  • Download
Principle

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

Features

RBBF Handheld/Portable Type Clamp-on Ultrasonic Water Flow Meter Features:

  • 2 line LCD display with flow rate, totalizer & diagnostics
  • Small sized (8.25" x 3.50" x 1.48") and lightweight (≈1 lb.)
  • Wide range of fluid velocities - 0.03 ~ ±105 feet/sec. (0.01 ~ ± 32 m/s)
  • Long-life Ni-MH battery for up to 12 hours of continuous operation
  • Transducers for pipe sizes ranging from ½" ~ 240" (15 to 6000 mm)
  • High accuracy - ±0.5% of reading
  • Clamp-on transducers feature integral magnet for installation on metal pipe without use of a mounting belt
  • Data logger function includes date, totalizer, & signal condition diagnostic
  • Fast response time - less than 1 second
  • Operating time is more than 15 hours
Specification

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

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
Model Selection

RBFM 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
Applicants

RBBF Handheld/Portable Clamp-on Type Ultrasonic water Flow Meter Applications:

  • HVAC, energy measurement system   
  • Water (hot water, cooling water, De-ionized water, potable water)
  • Petroleum products         
  • Chemicals, including alcohol, acids, etc
  • Beverage, food and pharmaceutical processors
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