Kalguard Watermatic Kalguard+ Controller & Kalguard Pulse Splitter.

This is the control system for Kalguard scale removers, it monitors the water flow and adjusts the anode to match. 

If you are looking at this specialist peace of kit then no doubt you will better than me the use.

Offered here at a bargain price to clear, these cost £300 plus if bought separately though usually supplied with the complete system. 

shipping included.