Can "specific conductance" be measured with a Hach conductivity probe?

Document ID

Document ID TE6091

Published Date

Published Date 27/05/2017
Question
Can "specific conductance" be measured with a Hach conductivity probe?
Summary
Types of conductance.
Answer
There are several different types of conductivity. At its core conductivity or conductance of a material is that material's capacity to facilitate the transfer of energy through the material. Energy comes in many forms, so with different forms of energy there are different types of conductivity including: Thermal Conductivity, Ionic Conductivity, Hydraulic Conductivity, and Electrical conductivity. In water analysis electrical conductivity is the type of conductivity of interest, which is conductivity as it refers to the transfer of electrical energy.
 
Electrical conductivity comes in two forms: metallic, and electrolytic. Electrolytic conductivity is a liquid solution's ability to facilitate the transfer of electrical energy through the movement of ions in the solution.
 
Electrolytic conductance comes in three forms: Equivalent, Molar, and Specific conductance. Specific conductance is the industry standard for water analysis as it is defined as the electrolytic conductance between two cells separated by a centimeter of medium. This is why the unit for specific conductance is in S/cm (conductance per centimeter).
 
All Hach "conductivity" sensors measure "specific conductance" by definition. It is just simplified and referred to as simply "conductivity" because they type of specific conductance is implied by the sample being water.