特点探头结构(垂直,45 ,90 )挤出机和注塑成型机用熔体传感器注塑成型机用喷嘴熔体传感器环形和凸形传感器用于表面温度测量--例如模具或圆桶 Thetypicalplasticsindustrysensorassemblyconsistsoffourcomponents:AttachingdeviceElementElementprotectionColdendterminationThesensorisfurtherdefinedbyitsphysicalattributes:NumberofelementsJunctionstyle(hotend)Probeconfiguration(straight,45 ,90 )LengthofcomponentsSomesensorsaredesignedforspecificapplicationsandhaveauniqueattachingdevice;othersaredesignedforgeneralapplicationandhaveacommonattachingdevice.Somesensorsaredesignedforspecificapplicationsandhaveauniqueattachingdevice;othersaredesignedforgeneralapplicationandhaveacommonattachingdevice.UniquemountsincludeMeltboltNozzlemeltRingorLugThemeltboltsensorisusedonextrudersandinjectionmoldingmachines.Ameltbolt blank withaholethroughitslengthisweldedtotherigidtube.Thenozzlemeltsensorisdesignedforinjectionmolders.Twotypesareavailable:immersiontypeandnon-immersiontype.Theimmersiontypeisabolt blank withaholethroughitslengthonthesensortube.Thesensortipprotrudesthroughtheworkpeiceandseatsinabeveledholeintheworkpiece.Theattachingboltisthreadedintotheworkpieceandtightlysealsthetiptotheworkpiece.Thenon-immersiontypeisanattachingboltwithacenterhole.Ashorttubeseatsintheboltholeandsupportsthethermocouplejunctionagainstthebottomoftheholeintheworkpiece.Or,ifthesensorisanRTD,thetipispottedintheholeinthebolt.Ringtypeandlugtypesensorsmeasuresurfacetemperature suchasabarreloramold.Thesensorleadsarejoinedattheringorlug(hotjunction).Thesensorattachestoathreadedstudontheworkpieceandmustbesecuredwithanut.Generalapplicationsensorsarecommonlycalledtubestylesensorsandaremountedwith:Bayonetlock,orThreadedbushing.Thesedevicesaresecuredtotherigidtubeportionofthesensorassembly.Varidepth sensorshavenorigidtube(otherthanthetip).TheelementofaVaridepthsensorisprotectedbyeitheraflexibletubeorspring.Bothofthesecomponentsarecompressible.Varidepthsensorsareequippedwithabayonetstylelockcapdirectlyonthetubeorspring.Twotypesofbayonetlocksareavailable:fixedoradjustable.Thefixedbayonetlockissecuredtothetubebetweentworingsformedonthetubesurface.Theadjustablebayonetlockisheldonthetubewithacompressionringandnut.Twotypesofthreadedbushingmountsareavailable:fixedoradjustable.However,themorecommon,byfar,istheadjustablebushingheldonthetubewithacompressionringandnut.Thefixedbushingisbrazedtothetube.BoththeVaridepthsensorandthebayonetlockrequireamatingadaptertomountittotheworkpiece.Thethreadedbushingmountsdirectlyintoatappedholeintheworkpiece.Element:Thethermocoupleelementisdefinedbyitscalibration(type),wiresize(gauge),construction(solid,strand,insulation).Theresistancetemperaturedetector(RTD)isdefinedbyitsresistancecoefficient.ElementProtection:Elementprotectionisdefinedbyitsconstruction:rigidtube,flexiblearmor(orflexibletube),stainlesssteeloverbraid,spring,orinsulationonly.Rigidlengthisidentifiedasdimension X. Flexiblelengthisidentifiedasdimension Y. Thedepthofthefixedbayonetlockattachingdeviceisidentifiedasdimension Z. Sincethelocationofthebayonetlockonmostassemblies(butnotall)isnearthetransitionpoint(fromrigidtoflexible),the Z dimensionisequaltothelengthoftheprobe.Therefore,thereisno X dimension.ColdEndTermination:Coldendterminationisdefinedbythedevicewithwhichthesensorleadsareterminated:strippedends,spadelugs,plug,and/orjack.Itisfurtherdefinedbytheextendedlengthoftheleads thatis,leadsinadditiontothestandardlengthnormallyprovidedwiththatsensor.Extendedleadlengthisidentifiedasdimension L.