进口核子密度计核子密度计又称为核密度计、核浓度计、核子浓度计。进口核子密度计精度高、运行稳定。广州瑞发提供类似进口核子密度计的国产核子密度计产品，即国产核密度计。国产核子密度计性价比好，价格低。下面为核子密度计英文介绍：RADIOMETRICMEASUREMENTOFDENSITYWHYSHOULDDENSITYBEMEASURED?Inmanyindustrialprocessesknowledgeaboutthedensityisrequired-beitspecificgr***ityorbulkdensity-todrawaconclusiononprocessparameters.Inmanyinstancesdensityisonlyameasureforotherproperties:Byusingdensityitispossibletodeterminetheconcentrationofamixc***istingoftwomaterialsorthecontentofsolidmatterwhentransportedthroughpipes.DENSITYCANBEMEASUREDCONTINUOUSLYINRUNNINGPROCESSES.WHATARETHECAPABILITIESOFRADIOMETRICDENSITYMEASUREMENT?核子密度计能测量什么?Theresultoftheabsorptionmeasurementisinfluencedbythe***eragedensitybetweenthedetectorandthesourceofradiaton.Allthosepartswhicharecrossedbythemeasuringbeamanddonotchangeduringoperationareincludedinthecalibratetion.Sinceonlythemeduimtobemeasuredissubjecttochange,itispossibletodetermineexactlythedensity.Itisimportantthatthe***eragedensityisused.Thusonecanconcludetootherproperitesfromthismeasurement:specificdensity,concentrationofsolidmatter(i.e.coal,ore,salt)andconcentrationofmixes(acids,lye,contentofsugar).HOWDOESITWORK?核子密度计如何工作？Anelectromagneticw***ecalledGammaradiationwiththesamepropertiesofX-raysisweakenedaccordingtoitsdensitybypassingthroughmatter.Whenafixedintensityisknowrelatingtoitsdensity,theratiotoeveryotherdensitycanbecalculatedaccordingtotheintensityitletspassthrough.Likeanx-rayphotographhasitsdarkpartswherethedensityishigheralsotheintensityoftheGamma-raysbecomeslowerwithahigherdensity.Ahighaccuratdeterminationoftheintensitytherforeisabletodeterminethedensitytoapointwherelaboratoriessometimesh***edifficultiestoundercuttheerror.Toachievethisonlyafewcomponentsarenecessary:Thesource,installedinasecureleadshielding,furtherahighsophisticateddetectorandanevaluationunit.WHERECANMEASUREMENTSBEPERFORMED?Ac***tantmeasuringdistanceisnecessarytodeterminethedensityexactly.Thesimplestwaytoachievethisismeasuringthroughapipe.Butitisalsoachievableinatankorabunkerbyaspecialc***truction.Contactlessmeasurementisalsopossibleinacontainer:Neitherthesourceofradiationnorthedetectortouchthemedium.TECHNICALDETAILS:核子密度计技术参数THESOURCEOFRADIATION:核子密度计***源Toobtainasimplesourceofradiationanartificialradioactivemetalormetaloxideisused.Itisweldedintoahighsecuritycapsulemadefromstainlesssteel.Thecapsuleisthoroughlycheckedaccordingtointernationallaw-forexampleitwasheateduptoaveryhightemperatureandthenputintoicewater,ashocktestwasperformedetc.Theradiationcanemitthroughthewallofthecapsule,sotheradioactivematerialcanremaininitforever.Sincethesourceemitsradiationinalldirecti***,itisbuiltintoacontainermadeoflead.Thiscontainerhasa***allchannelfacingthedetector.Thechannelcanbeclosedfortransportorduringworkneartothemeasuringbeam.THEDETECTOR核子密度计探测器Whenradiationistobemeasureditmustbeabsorbed.Itpassesthroughagasdetectornearlyaneffectedsotomeasureacertainamountitneedsabiggersource.Ahighdensmaterialcanabsorballtheradiationcommingin.Thistypeiscalledscintillationdetectorwithcrystalwhichconvertsradiationintoflashesoflight.Thelightisamplifiedbyaphotomultiplierandisthenregisteredelectronically.Aspecialstabilizingcircuitrywhichanalyzesthespectrumoftheradiation,andkeepsc***tantthecharacteristics,providesforexactmeasurementinspiteofalteringtemperatureandaging.THEEVALUATIONSincethedetectoralreadydeliversadigitalsignal,thesuccessingcircuitryonlyhastoperformthemathematicalconversionandthecalibration.Aprocessorcardbuiltwith***Dsallowsforallfuncti***toresideonasinglecard.Thisdevicetakesintoaccountallpossibleapplicati***.Includedarethepowersupplieswith230,115,and24VACorDC.AbacklitalphanumericalLCdisplayallowsaneffectivedialogueandaverysimplewayofoperationinspiteofthecomplextask.Afterinstallationthelevelofdensityisdisplayed,whichonlyhastobecorrectedinteamworkwiththelaboratory-throughautomaticcalculationoftherequiredparameters.Theregisteredvalueisputoutdigitally,byabargraphandwithapotentialfree0/4-20mAoutput.Ofcoursetherearealsofreelyadjustablerelaisswitches.TECHNICALDATAEVALUATIONUNITSupply:Standard:-230V~Optional:-115V~,24V~,24V=Counterinputs:2counters1,2,4or8cyclespersecondDigitalinputs:4galvanicisolatedinputsDigitaloutputs:Standard:4potentialfreerelaiscontactsOptional:4electronicrelaisCurrentoutput:Standard:1analogoutput(potentialfree)Optional:2currentoutputfor2ranges(0..20mAor4..20mAselectable)detectionofwirebreakAdditional:illuminated4-line-LCDisplay(4x16char.)keyboardwithtactileandacousticalnotificationBatterieholdviaLithiumcellWatch-Dogfunctionoptional:-serielleRs232interfaceTemperature:0°-55°C(envirement)Size:101,4mm(20TE)x132,5(3HE)x160mm(WxHxD)Weight:318gCabinet:IP54SHIELDINGSteelcasewithnormalflangeC125x133DIN2631Weightapprox.40kgShieldingthroughleadfillingwithCs-137approx.10HWSDETECTORScintillator:NaJ/TI(normal50x50mm)Stabiltity:+/-0.1%between0-50°CHighvoltage:generationindetectorOutput:squarepulsesCabling:Connectionthreewires(normal0,75mm²)Weight:approx.18kg)