Ultrasonic Bulk Water Meters

RBBW DN50-1000 District Ultrasonic Water Meter(Bulk Water Meters) is an innovative flow meter with static flow sensor based on the ultrasonic measuring principle. RBBW 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

District Ultrasonic Bulk Water Meters (DN50 to DN1000) 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

RBBW District Ultrasonic Bulk Water Meters (DN50-1000) Specification:

DN mm

50

65

80

100

125

150

200

250

300

350

400

500

600

Q4 m3/h

31.25

50

78.75

125

200

312.5

500

787.5

1250

1250

2000

3125

5000

Q3 m3/h

25

40

63

100

160

250

400

630

1000

1000

1600

2500

4000

Q2 m3/h

0.1

0.16

0.252

0.4

0.64

1

1.6

2.52

4

4

6.4

10

16

Q1 m3/h

0.063

0.1

0.158

0.25

0.4

0.6255

1

1.575

2.5

2.5

4

6.25

10

Staring flow

0.01

0.02

0.03

0.05

0.08

0.1

0.2

0.3

0.4

0.6

0.75

1.2

1.8

L mm

200*/ 270

200*/  300

225*/ 300

250*/ 350

250*/ 350

300*/ 350

350

450*/ 400

500*/ 450

500*

600*/ 550

600*/ 650

800*

L1 mm

120

120

120

120

120

120

120

120

120

120

120

120

120

B mm

172

190

205

230

250

285

340

395

445

505

565

670

780

D mm

165

185

200

220

250

285

340

395

445

505

565

670

780

H1 mm

60

70

90

100

125

130

170

198

223

253

283

335

390

H mm

240

260

280

300

380

400

470

525

575

635

690

790

895

W mm

123

n x ∮D1

4 *∮18

8*∮18

8*∮22

12*∮22

16*∮22

16*∮26

20*∮26

20*∮30

Q3/Q1

400:1 (500:1; 800:1 optional)

Working pressure

1.6MPa

1.0MPa(1.6MPa can be customized)

Pressure lose

⊿p25

⊿p10

Channel

2-channel

3-channel

Max volume (m3)

99999999.99999

Accuracy class

Class 2

IP grade

IP68

Medium temperature

T30,T50*,T70 (T50 default)

Power supply

3.6V lithium Battery (24DC, 220VAC customized)

Battery Lifetime

≥10 years

≥DN200 ≥6 years

Installation

At any angle

IP Grade

IP68; (IP65 for 24DC, 220VAC)

Environment class

Class C (Class B and I for optional)

Electromagnetic class

E1 (E2 option)

Medium

Conduit is fully charged with water

                                   

Remark:

  • Q1:  Minimum flow rate           Q2: Transitional flow rate
  • Q3: Permanent flow rate            Q4: Overload flow rate
  • * is standard default
 
   



Model Selection

District Ultrasonic Water Meter 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

District Ultrasonic Water Meter Typical Application

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

Catalog - District Ultrasonic Water Meter

Manual - District Ultrasonic Water Meter

Other Files - District Ultrasonic Water Meter

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