macromatic cokp01a22 relay and socket 70170-D
total cost about 90.00
this enables system to monitor power use of IntelliFlow VF (or any variable speed programmable pump..) and to intelligently switch on/off the SWCG based on power settings (pickup and dropout, measured as a percentage of pickup amperage)
currently I have relay dialed to turn on IC40 cell at about 120 watts and to power off at 110 watts.
when I run an all day program at 95 watts, 875 rpm, the relay automatically turns off IC40 and there is no need to depend on the flow switch sensor (which would also turn RED but keep the transformer and the cell powered without a current control relay).
when system runs a 20 GPM or higher program, the IC40 automatically turns on and measures water salinity and resumes running preset program for chlorine generation.
pictures show final installation, without the enclosure flip cover (allowing quick adjustments as needed or changes to relay programming).