Available from Myron L Company
All Myron L handheld instruments are factory calibrated with NIST traceable Standard Solutions having specific conductivity/ppm values. MyronL Company Standard Solutions are made under strictly controlled conditions using reagent grade salts. These salts are mixed with deionized water having a resistivity of at least 5 megohms-cm purity.
Myron L Company Standard Solutions have an accuracy of ±1% based on values published in the International Critical Tables and traceable to the National Institute of Standards and Technology.