Thermal power plants measure cation conductivity and are used for detecting seawater leakage.
The cation conductivity is the conductance measured after removing positive ions, which most commonly used to be done by employing cation-exchange resin. However, the ion exchange capacity of the cation-exchange resin decreases in proportion to the amount of cations exchanged and, therefore, it is necessary to regularly reactivate the resin in order to maintain its capacity.
The new Electric Cation Exchanger utilizes an electric dialysis membrane and does not require reactivation because the positive ions move from the anode to the cathode.

The major characteristics of the device are as follows:

1. The cation-dialysis membrane does not need to be reactivated because positive ions can penetrate the membrane.
2. It is possible to reduce the time spent on maintenance because the filter and membrane do not need to be replaced as frequently as formerly. (The exact frequency of replacement depends on the water quality.)
3. Remote operation means that the device can be started from outside as can resetting of the alarm.
4. The operational conditions of the device can be verified by the alarm.

Principle figure

System diagram