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For measurements in the low-conductivity range, stable and reliable calibration standards are critically important. Since a conductivity standard is not a buffer solution, the lower the value of the conductivity standard, the greater the effect of entry of CO2 or contamination. Hamilton is the first manufacturer to offer patented conductivity standards of 1.3 and 5μS/cm with a certified accuracy of ±1% and a lifetime of 1 and 3 years, respectively. The procedure for determining conductivity was developed in collaboration with DFM. Many metrological institutes choose Hamilton standards because of their unprecedented stability and independent verification by PTB. During an interlaboratory test among prestigious European metrological institutes (PTB, DFM, DAkkS) Hamilton standards were used as measurement solutions. Certified by an independant accredited laboratoryFulfills all requirements of United States Pharmacopia USP Chapter 625 |