The Thermomolecular Pressure Difference Effect
The thermomolecular pressure difference is one of several phenomena that are significant when pressure measurements are made under purely gaseous conditions, particularly when large differences in temperature exist between the place in which pressure measurements have to be carried out and a reference place, where temperature is generally room temperature and precise pressure measurements can be made by primary or transfer standards. Such phenomena need careful consideration and must be corrected for.
KeywordsPressure Difference Stainless Steel Tube Tube Surface Free Molecular Flow Reference Place
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