Complex sentence: For example, in the boiler water technology, the boiler blowdown is continuously monitored for "cation conductivity", which is the conductivity of the water after it has been passed through a cation exchange resin.
Split into simpler sentences: For example, in the boiler water technology, the boiler blowdown is continuously monitored for "cation conductivity". Here, "cation conductivity" is understood as the conductivity of water after it is passed through a cation exchange resin.