Features• Residentialpotablewaterconsumptionmetering• Temperaturecompensatedforcoldwateraswellashotwaterupto60°C(140°F)

• Nomovingparts.Wear-freeultrasonictechnology• Durable,provenBRASSsensorbody.Solvesthechallengesinharshenvironments

• Patentedsensordesign.providesprecisesignal,robustperformance,andisnotimpactedbywaterimpurity

• Excellentlong-termstabilitywithconsistentperformance. Accuracydoesnotdegradeovertime• Maintenance-free• Leakagedetection• Tamper-proofdesign.Recordswhentemperingisdetected

Applications• Revenuemetering• Residentialsubmetering• Commercialbuildings• Leakagedetection• AMR/AMIandbilling• Drive-bymetering

MEASURE TODAY.ENSURETOMORROW

• Notaffectedbymagneticinterference• Doesnotmeasureentrainedairinpipe• Bi-directionalflow• Lowpressuredrop• Freepositioningforinstallation• LargeLCD,9digitsdisplay• Morethan10yearsbatterylife• IP68water-proof• NISTcalibrationtoMetrologyISO4064ClassD• Radiomodulefordrive-bymeterreadingorAMR/AMIfixedmeterreading

• DataLoggerwith700dailytotalsand24monthlytotals• OptionalSpireCaptureAMR/AMIandBillingsolutions

wPrimeTM Series 280W-DRESIDENTIALULTRASONICWATERMETER

SpireMeteringTechnologyLLC,15CraigRoad,Acton,MA01720,USA

Tel+1978263-7100/888738-0188(toll-free)Fax+1978418-9170sales@spiremt.comwww.SpireMT.com

DS-280W

D-1410_Rev5

wPrime™ Series 280W-DRESIDENTIAL ULTRASONIC WATER METER

MEASURE TODAY. ENSURE TOMORROW2

AmemberofthewPrime™Series,the280W-DResidentialUltrasonicWaterMeterisspeciallydesignedfordomesticwatermeteringapplicationswhereconventionalwatermetersfailduetoharshenvironment,solidsinwater,performancedegradation,magneticvandalizationorincapableofleakagedetection.

The280W-Doffersthemostadvancedwaterflowmeasurementbyusingstate-of-the-artultrasonictechnology.Itsflowsensordoesnothaveanymovingpartsthatcanwearortear,whichprovidesarobustandaccuratemeterwithnomaintenance.

Thetechnicalspecificationsofthe280W-DmeetthestandardsforresidentialutilitymeteringwithitsClassDperformance,operationaltemperaturefrom0.1°Cto60°Candsafetytemperatureupto95°C,aswellasnominalpressureof1.6MPa.Thewidedynamicrangeallowsforaloaduptodoubletherating,therebyensuringhighoperationsecurity.ThelargeLCDcandisplaytheflowtotal,leakagealarm,reverseflow,andmore.Themeteralsohasaremotereadoutwhichcouldbeconfiguredaspulse,M-BusorRFwireless.

SpireMetering’s280W-DResidentialUltrasonicWaterMeterstandsoutamongitscompetitionduetoitsrobustperformance,patentedsensordesign,tamper-prooffeature,multipleAMR/AMIoptionsandcapabilitytodetectverylowflowrate.Itworksreliablyevenwhenthewaterhasparticlesandtheenvironmentisharsh,suchasthecaseinMiddleEastandAfrica.Residentialinstallationscanprofitfromtheadvantageofthewear-freewaterflowmeasurement,namely,precision,operationsecurityandlongservicelife.

wPrime™ Series 280W-DRESIDENTIAL ULTRASONIC WATER METER

MEASURE TODAY. ENSURE TOMORROW 3

ThewPrime™serieswatermeterhasusedadvanceddigitalsignalprocessingtechnologytopreciselymeasurethetransit-timeofeachultrasonicpulse.Astatisticalgorithmisalsousedtocounterinterferencewhichcouldcomefromsolidsorairbubblesinthewater.Theflow-cellisoptimallydesignedaccordingtoourpatentedtechnology,sothatthemultimodereflectionintheflowtubeissignificantlyattenuated.Itallowssignificantincreaseinsignalstrengthandquality,thus,therobustnessofthesystem.Theflowratecalculationisbasednotonlyontransit-timedifferenceandthegeometryoftheflow-cell,butalsoonfluiddynamicstheory.

Onlyultrasonicpulsesareusedtointerrogatetheflowwhichenablesthemetertohavenomovingparts.Therefore,thereisnothingtowearoutorcauseareductioninaccuracy.Inaddition,theprincipleisbasedonthetransit-timedifferenceinsteadoftransit-time,alltheinterferingfactors,suchasthetemperature,pressure,solidsconcentrationandwaterquality,arecancelledout.Theendresultisthatthesystemisinherentlyrobust!

Operating PrincipleThewPrime™serieswatermeterconsistsofaflowsensorandanintegrator.Theflowsensorisaflow-cellmadefrombrass(figurebelow.)Twoultrasonictransducers,AandB,arefirmlymountedontheflow-cellatoptimalpositions,withtworeflectorsinsideoftheflowtube.Theultrasonicsignalgeneratedbyonetransducerisdirectedtowardtheflowdirectionbythereflectorbelowit.Whentheultrasonicsignalreachestotheotherreflector,itisredirectedtothetransduceraboveit.Therefore,eachtransducercanreceivethesignalsentfromanothertransducer.

Anintegrator(orcalculator)controlsthetwoultrasonictransducerstotransmitandreceiveultrasoundinanorderlyfashionsoastoconductpreciseflowmeasurement.Specifically,theintegratoroperatesthetwotransducerstosimultaneouslytransmitapulseofultrasonicenergyintothewaterflow.Thepulsesignaltravelsalongtheflowandreachestotheothertransducerundertheguidanceofthetworeflectors.Obviously,thedownstreampulse(fromAtoB)travelsfasterthantheupstreampulse(fromBtoA).Thetraveltime(ortransit-time)differenceofthetwopulsesisdirectlyproportionaltoflowvelocity.Therefore,theflowratecanbederivedfromthetransit-timedifferenceaccordingly.

•Reflector

wPrime™ Series 280W-DRESIDENTIAL ULTRASONIC WATER METER

MEASURE TODAY. ENSURE TOMORROW4

ThewPrime™serieswatermeteroffersavarietyofinterfaceoptions,suchasM-Bus,RS485withModbus,Pulse,aswellasbuilt-inRFwireless.ItisflexibletobeintegratedintoanAMR/AMIsystemoradrive-bysystem.

SpireMeteringalsooffersacompleterangeofAMR/AMIsolutionsaswellasanintegratedbillingsystem.TheSpireCapturesystemisacuttingedgefixedautomaticmeterreadingsystemwhichintegratesbothwiredandwirelessAMR/AMItechnologies.ThesystemprovidesaunifiedplatformformeterreadinganddatamanagementthroughM-Busnetworks,RFwirelessnetworks,GSMnetworks,GPRSnetworks,BACnetnetworksaswellasTCP/IPnetworks.Inaddition,itworksseamlesslywithSpireMetering’sbillingsoftwaretomakedataexchangeeasy,fastandreliable.

SpireCaptureisanadvanced,highlyrobustmeterreadingsolutionthatdeliverscomprehensiveusageinformationaswell

astimely,high-resolutionmeterreading.Thisdataenablesgas,water,heatandelectricutilitiestoeliminateon-sitevisitsandestimatedreads,reducetheftandloss,implementtime-of-usebilling,andprofitfromallofthefinancialandoperationalbenefitsoffixed-networkAMI/AMR.

Otherthanautomaticmeterreading,SpireMeteringalsooffersdrive-bysolution.Fordetailedinformationondrive-bysystemandAMR/AMIsystem,pleasecontactusatsolutions@spiremt.com.

Automatic Meter Reading

Wireless M-Bus Concentrator

Data CenterGateway

GPRS network(Cellular data network)SHENITECH

M-BUS

SHENITECH

M-BUSM-BUSM-BUS

SHENITECH

M-BUS

SHENITECH

M-BUSM-BUSM-BUS

SHENITECH

M-BUS

SHENITECH

M-BUSM-BUSM-BUS

SHENITECH

M-BUS

SHENITECH

M-BUSM-BUSM-BUS

SHENITECH

M-BUS

SHENITECH

M-BUSM-BUSM-BUS

wPrime™ Series 280W-DRESIDENTIAL ULTRASONIC WATER METER

MEASURE TODAY. ENSURE TOMORROW 5

Technical Specifications

Notes:• Default pipe joint is BSP threading. 

• NPT threading is available upon request.

• L is flow sensor length. L1 is the total length of flow sensor plus extension pieces.• Weight does not include extension piece. It may vary. Please contact us for exact measure.

• 1m3/h is about 4.4GPM.

• Dimension H, Φ1 and Φ2 are for reference only. Please contact us for exact measure.• Optional strainer

Size Flowrate Dimensions Pressure Loss(bar)

Weight(kg)

Pipe Joint (BSP)

mm inQ3 Q4 Q2 Q1 Qs L L1 H H1 Φ

Sensor Ext. Piecem3/h GPM m3/h l/h l/h l/h mm in mm mm mm mm

15 ½ 2.5 11.0 3.125 16 10 3 165 6 ½ 261 102 167 108 0.48 0.8 G3/4B R1/2

20 ¾ 4 17.6 5 25.6 16 4 190 7 ½ 296 107 172 108 0.27 0.95 G1B R3/4

25 1 6.3 27.8 7.875 40.32 25.2 5 260 10 ¼ 382 112 177 108 0.23 1.2 G1 1/4B R1

32 1 ¼ 10 44.1 12.5 100 62.5 6 260 10 ¼ 386 121 186 108 0.38 1.4 G1 1/2B R1 1/4

40 1 ½ 16 70.5 20 160 100 8 300 12 431 132 197 108 0.42 1.6 G2B R1 1/2

wPrime™ Series 280W-DRESIDENTIAL ULTRASONIC WATER METER

MEASURE TODAY. ENSURE TOMORROW6

Electrical DataPowerSupply: Battery,3.6V,Lithium

ReplacementInterval: >10yearsattBAT<30°C(86°F)

PowerConsumption: <0.1W

BackupPowerSupply: InternalSuperCap

CommunicationInterface: M-Bus(default).Optional:opticalisolatedPulse,RF433MHzorRF868MHzOthertypecanbecustomizeduponrequest

CEapproval: EN61326-1:2006

Accuracy / MPE (Maximum Permissible Error)MPEaccordingtoISO4064:2005orOIMLR49

±2intherangeQ2≤Q<Q4;±5intherangeQ1≤Q≤Q2[forT≤30ºC(85ºF)]

±3intherangeQ2≤Q<Q4;±5intherangeQ1 ≤Q≤Q2[forT>30ºC(85ºF)]

DynamicRange:R=250forDN15~DN25;R=160forDN32~DN40

For hot water (≥30ºC)

For cold water (<30ºC)

Erro

r (%

)

6

5

4

3

2

1

0

-1

-2

-3

-4

-5

-6

Q1 Q2 Q3 Q4Q

wPrime™ Series 280W-DRESIDENTIAL ULTRASONIC WATER METER

MEASURE TODAY. ENSURE TOMORROW 7

Mechanical DataMetrologicalClass: 2(accordingtoISO4064:2005orOIMLR49)

EnvironmentalClass: B/C

ElectromagneticClass: E1

EnvironmentalTemp: 0~60°C(32~140°F)PermissibleFlowTemp: 0.1~60°C(35~140°F)forlongtermandupto95°C(203°F)forshortterm.

EnclosureProtection: IP68

IntegratorDetachable: No

Pressure: PN16

Pressure LossThepressurelossofaflowsensorisproportionaltothesquareontheflow:Δp=kxQ2

HereΔpispressureloss,Qisvolumeflowrateandkisthecoefficient.TheDN15(½”)meterhask=0.067andΔplessthan0.48baratQ3.TheDN20(¾”)meterhask=0.019andΔplessthan0.27baratQ3TheDN25(1”)meterhask=0.006andΔplessthan0.23baratQ3.ThepresslossesforallthesizesmeettheISO4064:2005,OIMLR49andAWWAstandards.

Pressure Loss vs. Flowrate

wPrime™ Series 280W-DRESIDENTIAL ULTRASONIC WATER METER

MEASURE TODAY. ENSURE TOMORROW8

FormerlyShenitech,SpireMeteringisagloballeaderinflowandenergymanagementsolutions.Throughcontinuousinnovation,wetransformcomplexultrasonictechnologyintoaffordable,reliablesolutionsforaccurateflowandenergymeasurement.SpireMeteringofferswater,heat,electricityandgasmetersaswellasAMR/AMIsolutions.Tofindouthowwecanhelptoday,pleasetellusaboutyourapplication.

About Spire Metering Technology

Order Specifications

Example #1280W-D-DN15-1-A-0standsforthe280W-DwPrime™SeriesResidentialWaterMeterforpipeDN15mmwithM-Businterface,BSPpipejointandaQ3flowrateof2.5m3/h.

Example #2280W-D-DN20-2-A-1standsforthe280W-DwPrime™SeriesResidentialWaterMeterforpipeDN20mmwithbuilt-inRF433MHz,BSPpipejointandaQ3flowrateof4.0m3/h.

Output InterfacePulse 0

M-Bus(default) 1

RFwireless433 2

RFwireless868 3

Encoder 4

Other,pleasespecify 5

Pipe JointA BSP(default)

B NPT

Accessory0 None

1 Withextensionpiece(tailpiece)

2 Other,pleasespecify

MeterSize DN15/½” 15

DN20/¾” 20

DN25/1” 25

DN32/1 ¼” 32

DN40/1 ½” 40

280W-D-DN - - -