Conductivity Standard 84 S/cm kap. 230 ml | Hanna HI 7033M Descriptions : H7033M is a premium quality84 'S/cm conductivity solution standardized with a conductivity meter that has been calibrated with potassium chloride NIST 2202 SRM (Standard Reference Material) in deionized water for analytical use in accordance with ISO 3696/BS3978. Additional equipment used in preparation of the solutions include certified weight-checked balances, Class A glassware and certified thermometers.