Conductivity
On-line conductivity meters must be utilised as a prerequisite to the control strategy and be installed at various
locations within the RO system. The location of these meters should take account of the locations specified above under TOC but should also consider the monitoring of RO concentrate and permeate in order to aid with determination and trending of percentage rejection from the system in operation. Changes in rejection percentages can be an indication of membrane failure, seal failure, improper pH, feed pressure issues and increased scaling or fouling.