美国SI（SCIENTIFICINSTRUMENTS）超低温硅二极管温度计SI445SI410等测温范围：1.5K-500K，不校准精度：0.1K@4.2K校准后精度：20mK@4.2K可用于超流氦，液氦，液氢等超低温测温，以及低温到高温大跨度温度范围测温。封装有：裸片（宽1.32mm，长1.37mm，厚0.46mm）CAP圆薄片（直径1.2mm,后1mm）,圆柱体（直径2.9mm,chang5mm）,圆片带孔封装（直径9mm,厚3.8mm，偏心孔2.9mm）Si445SiliconDiodeTemperatureSensorSi440SiliconDiodesofferagreatvalueforapplicati***requiringawidetemperaturerange.TheyareinterchangeablewiththeSi430inapplicati***below400Kbutareruggedenoughtowithstandexposureto500K.ThenewCAPpackageisthe***allestencapsulateddiodemountonthemarket.Specificati***Range:1.5K–500KExcitation:10μA&plu***n;0.1%Repeatability:75mK@4.2K,0.35K@77K,0.25K@273KMagneticFieldUse:Notrecommendedforfieldsabove0.1Teslabelow40KUseinRadiation:Notrecommendedforuseinhighradiationenvironments.Leads:37AWGCopper,Polyimideinsulation,3inchesstandardlengthMountingOpti***:CAP,Canister,22Bobbin,25Bobbin(seeReverse))