兩線制4-20mA輸出PMT系列粉塵濃度變送器是一款久負盛名、幾乎免維護的一款電荷感應粉塵流動檢測產(chǎn)品,能提供連續(xù)在線粉塵含量檢測和除塵設備粉塵泄漏檢測。 探頭工作原理:采用電荷感應和探頭保護技術,當粉塵微粒流經(jīng)探頭附近的時,微弱的電信號感應進入到探頭中,一個DSP數(shù)字信號處理器處理此感應信號,成為一個線性比例與粉塵威力質(zhì)量含量的絕對輸出值。由于采用了探頭保護技術和電荷感應技術,確保該探頭能檢測各種潮濕粉末和高導電粉塵,傳感器為被動型(無電源和電子電路),基本免維護,非常耐用。 測量范圍: 0.3微米的任何顆粒探測等級:0.1PA等效于0.1mg/m3,0.5PA等效于0.5mg/m3,5.0PA等效于5.0mg/m3。輸出:4-20mA 優(yōu)點:1.比傳統(tǒng)的摩擦電原理的粉塵探頭具有更高的可靠性 2.滿足美國國家環(huán)保局EPA認證 3.對于各種腐蝕、粘稠氣體、水比較多,需要儀表本身比較耐磨損和防堵塞的場合. 應用場合 各種管道氣體輸送粉料,氣體加壓運輸?shù)纫约安即龎m(收塵設備),高爐余壓發(fā)電TRT粉塵保護.嚴格和傳統(tǒng)的摩擦電原理粉塵探頭區(qū)分.特性: Service:Airandcompatiblegases,anytypeparticulateconductiveornonconductive.WettedMaterials:304SSandPTFE.AirVelocityRange:300ft/minandhigher.MinimumDetection:Standard:10.0pA,Optional:5.0pAand0.5pA.TemperatureLimits:Ambient:-15to160 F(-25to70 C);Process:Standard:-40to250 F(-40to120 C);Optional:-40to450 F(-40to232 C).PressureLimit:10psi(0.69bar).PowerRequirement:18-28VDC(24VNominal).OutputSignal:4-20mA.LoopResistance:300Ohmsmaximum.CurrentConsumption:Poweredfrom4-20mAloop.ElectricalConsumption:TerminalBlock.ProcessConnection:SeeModelCharton.EnclosureRating:Weatherproof,NEMA4X(IP66).MountingOrientation:Any.Weight:Varieswithlengthofprobeandtypeofmount.AgencyApprovals:CEOrdinarylocationsonly,CSA選型表EXAMPLEPMTA11T1P11L1.5PMT-A11T1P1-L1.5ParticulateTransmitter,ordinary/generalpurposelocations,CEapproval,NEMA4X,CSA,,1/2 NPTconnection,250 Fmax.temp.,10psimax.pressure,10.0-5000pA,1.5 probe.SERIESDESIGNATORPMTPMTParticulateTransmitter(1-piececonfiguration,sensorincludedinprice)ENCLOSURERATINGA1Ordinary/GeneralPurposeLocations,CEApproval,NEMA4X,CSAAHZ2HazardousLocation,CSAApproval,ClassI,DivisionII,GroupsA-D;ClassII,GroupsF,GPROCESSCONNECTION11/2 NPT21.5 QuickClampConnection32 150#ANSIFlange42 150#ANSIFlangewithProcessMatingFlangeandInstallationKit.MAXIMUMPROCESST1250 F(121 C)TEMPERATURET2450 F(232 C)MAXIMUMPROCESSP110psiPRESSURERANGE110.0-5000pA25.0-5000pA30.5-5000pA(requiredforlowlevelsorEPAleakdetection)INSERTIONLENGTHL1.51.5 Probe(recommendedatL033 Probeleast1/2ductdiameter)L055 ProbeL1010 ProbeL1515 ProbeL2020 ProbeL3030 ProbeL3636 Probe