Ultrasonic Water Meter

RBBW DN15-40 Residential Ultrasonic Water Meter is an innovative flow meter with static flow sensor based on the ultrasonic measuring principle.

RBBW Battery powered Ultrasonic Water Meter utilizes ultrasonic measuring methodology and microprocessor technology. All calculation and flow measuring circuits are designed on one single board, thus offering exceptional accuracy and reliability.

 

 


 




 


Description

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

Measuring principle of Transit-time Ultrasonic Water Flow meter

RBBW Series Inline  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 in which case the ultra sound transverses the pipe twice, or W-method in which case the ultra sound transverses the pipe four times, or in Z-method in which case the transducers are mounted on opposite sides of the pipe and the ultra sound transverses the pipe only once. The selection of mounting method depends on pipe and liquid characteristics. When the flow meter works, the two transducers transmits and receives ultrasonic signals amplified by multi beam which travels firstly downstream and then upstream (Figure 1). Because  ultra sound travels faster downstream than upstream, there will be a difference of time of flight(△t). When the flow is still, the time difference(△t) is zero. Therefore, as long as we know the time of flight both downstream and upstream, we can work out the time difference, and then the flow velocity (V) and flow volume (Q) via the following formula.

 

 V= K*D*                

V: Liquid velocity

K: Constant

D: Distance between the two transducers

△t: Difference in time of flight

Features

Residential Ultrasonic Water Meter Features:

  • Water temperature detection, low temperature alarm
  • Abnormal water usage alarm
  • Low starting flow rate, minimum flow rate is 1/3 traditional water meter
  • High-precision machining centers, initiating action to prevent the occurrence of product non-conformity, stable and reliable
  • Adaptable to inferior water quality, low in maintenance cost
  • Ultrasonic signal quality detection
  • Low initial flow rate and min. flow velocity measured is 0.002m/s;
  • No mechanical moving parts, long service life
  • Ultralow power consumption, battery with over 10-years (DN15-40) & 6-year life time (DN50-600 Flanged type); less than 0.0008W
  • Support optical, 4-20mA, RS485 and M-BUS & Wm-Bus(wireless), LoRa, NB-IoT, Pulse communication interface; available in remote reading (AMR), and easy for central control and management
  • Complies to MODBUS RTU and EN13757 communication protocol
  • IP68 of the whole meter, for each unit of the meter is IP68 designed; mounting, immune to any impact on measuring and pressure dropping to a minimum meanwhile
  • Approved according to GB/T 778-2007 and MID certification
  • Advanced calibrating device, adopt international advanced automatic heat meter calibration device, ensure the product accuracy
  • Comply to drinkable water standard requirement

 

Specification

Residential Battery powered Ultrasonic Water Meter(DN15 to DN40)

Nominal Diameter DN mm 

15

20

25

32

40

Max  flow rate Q4m3/h 

3.125

5

7.875

12.5

20

Nominal flow rate Q3 m3/h 

2.5

4

6.3

10

16

 Nominal flow rate Q2 m3/h 

0.016

0.026

0.04

0.064

0.102

Minimum flow rate Q1L/h 

0.01

0.016

0.025

0.04

0.064

Startup flow rate m3/h 

0.002

0.002

0.005

0.007

0.011

Pressure loss Δ 

⊿p40

Body length Lmm 

165*/110

190*/130/195

260*/160/225

26*/180/230

300*/200/245

Length with coupling  L2mm

259/204

294/234/299

380/280/345

380/300/350

428/328/373

Calculator length of L1mm

97

Height H1mm

31

28

25

29

36

Height Hmm

91

91

91

128

139

Calculator width  Wmm

90

Screw thread(inch)

G3/4B

G1B

G1 1/4B

G1 1/2B

G2B

Screw thread of coupling (inch)

R1/2

R3/4

R1

R1 1/4

R1 1/2

Dynamic range(Q3/Q1)

250:1 (400,500 option)

Working pressure

1.6MPa(other can be customized)

Max volume (m3)

99999.999999

Accuracy class

Class 2

IP grade

IP68

Medium temperature

T30, T50, T70 (T30 default)

Power supply

3.6V lithium Battery

Battery Lifetime

≥10 years

Installation

At any angle

IP Grade

IP68

Environment class

Class C

Electromagnetic class

E1

Medium

Conduit is fully charged with water

 
   



Model Selection

Ultrasonic Water Meter Model Selection

RBBW(DN15-1000) Ultrasonic Water meter

 RBBW

 X

X

X

X

X

X  

X

X

X 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

Pipe Size

 

XX

DN15 TO DN1000

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

Body Length(mm)

S

Standard Length

X

Special Length

 

Temperature

 

N

Normal temperature: 4-50℃

H

High temperature:4-100℃

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

Pressure Range

S

Standard Pressure

X

Special, pls clarify

 

 

 

 

 

 

 

 

 

 

 

 

 

 

Power supply

B

Battery Supply

DC

24VDC

AC

95-265VAC

 

 

 

 

 

 

 

 

 

 

 

 

Communication type

M

Wired M-bus

wM

Wireless M-Bus

R

RS485(Modbus protocol)

P

Pulse

4

4-20mA

S

LoRa

NB

NB-IoT

S

Special, pls clarify

 

Connection Type

 

C

Copper

 

D

DIN (En13757)

 

A

ANSI

 

S

Special

 

 

Pipe material

S

Standard

X

Special

 

R=Q3/Q1

 

S

Standard

 

X

Special

                                 

Remark:

  • DN15-40 Copper, thread;
  • DN50-100 Cast Iron, Flanges;
  • DN125-600 Carbon Steel and Flange type
  • Standard value: see the technical data

 

 
   

 

Applicants

Residential Ultrasonic Water Meter Typical Application

  • Smart Water Metering
  • Water supply, District heating/cooling water
  • Waterworks, Utilities,industrial and Agricultural Irrigation application
  • Leakage Detection Solutions
  • Groundwater Monitoring and Management Solutions
  • Chemical & Steel Industry;
  • HVAC Facility Management;
  • Building Automation;
  • Food & Beverage;
  • Power & Thermal Plant;
  • Pulp & Paper;
  • Pharmaceutical & Semiconductor;
  • Etc..
Download

Catalog - Residential Ultrasonic Water Meter

Manual - Residential Ultrasonic Water Meter

Other Files - Residential Ultrasonic Water Meter

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