All measurement uncertainties reported in SCL's calibration certificates or reports have been evaluated in accordance with principles in the ISO Guide to the Expression of Uncertainty in Measurement. The expanded measurement uncertainty U, with its coverage factor k, corresponds to a 95 % probability that the value of the measurand Y lies within the interval y - U to y + U. The combined standard measurement uncertainty u_c can be calculated as u_c = U/k and its degrees of freedom ν_eff is given by the t-distribution with the respective k value.

SCL's best measurement capabilities as accredited by Hong Kong Laboratory Accreditation Scheme (HOKLAS) are listed in HOKLAS website (click here).