The NIST Reference on Constants, Units and Uncertainty

Fundamental Physical Constants
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inverse of conductance quantum
 $ G_0^{-1} = 2\pi\hbar/2e^2$
 Numerical value  12 906.403 72... OmegaRed
 Standard uncertainty  (exact)
  Relative standard uncertainty  (exact)
 Concise form  12 906.403 72... Omega    
 
Click here for correlation coefficient of this constant with other constants
Source: 2022 CODATA     
recommended values 		 Definition of
uncertainty 		      Correlation coefficient with
any other constant

 
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