美国SI（SCIENTIFIC INSTRUMENTS）超低温硅二极管温度计 SI445 SI410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,chang 5mm）,圆片带孔封装（直径9mm,厚3.8mm，偏心孔2.9mm）
Si445 Silicon Diode Temperature Sensor
Si440 Silicon Diodes offer a great value for applicati*** requiring a wide temperature range. They are interchangeable with the Si430 in applicati*** below 400K but are rugged enough to withstand exposure to 500K. The new CAP package is the ***allest encapsulated diode mount on the market.
Specificati***
Range: 1.5K –500K
Excitation:10μA &plu***n;0.1%
Repeatability:75mK @4.2K, 0.35K @77K,0.25K @273K
Magnetic Field Use:Not recommended for fields above 0.1 Tesla below 40K
Use in Radiation:Not recommended for use in high radiation environments.
Leads:37 AWG Copper, Polyimide insulation,3 inches standard length
Mounting Opti***:CAP, Canister, 22 Bobbin, 25 Bobbin (see Reverse)