Profile: Koslow Scientific Co. specializes in innovative quality control instruments. Our product line includes metal & passivation test kits and electrodes. Our stainless steel inspector kit 1499 is made up of stainless steel. These are used for inspect tanks, pipes, raw stock, finished parts and confirm stainless steels & nickel alloys. Our mercury oxide is ideal for battery development, energy systems research and development, process control and general electrochemical studies. It is fast becoming an industry standard. The electrolyte is 20% potassium hydroxide. The standard electrode potential of the mercury & mercury oxide half-cell is ±0.098mV vs. the normal hydrogen electrode (NHE) in basic solution. NaOH Electrolyte is available as well as other custom concentrations