New approach to calibrating conductivity meters in the low conductivity range

摘要

There is currently a major issue with the calibration of conductivity meters used for high purity water: the lack of availability of a reference material or reference methods for low conductivity ranges (conductivity below 1 mu S cm(-1) at 25.0 degrees C, resistivity >1 M Omega cm at 25.0 degrees C). This paper describes the current status of conductivity measurements in high purity water. A new and improved approach, currently being investigated, should allow us to make the calibration of conductivity meters used for low conductivity ranges traceable to the SI.