Siemens unit

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The Siemens unit ( unit symbol : SE ), also known as the Siemens mercury unit , named after the German electrical engineer Werner von Siemens, was a unit of measurement introduced in German-speaking countries in 1860 for determining electrical resistance . It should not be confused with the SI unit of electrical conductivity , the Siemens , introduced later.

It was defined as the electrical resistance that occurs in a 1 m long mercury column with a cross-sectional area of ​​1 mm² below 0 ° C.

1 SE = 0.96 ohms

literature

  • François Cardarelli: Scientific Unit Conversion. A Practical Guide to Metrication , Springer Verlag, London 1997, p. 326