The Walchem WCT300-142 controller is now obsolete and has been replaced by the WCT400-142U controller which now has integrated USB datalogging and software upgrade capability. Otherwise, both the WCT300-142 and the WCT400-142U have the same specifications with bleed & feed, 120 VAC, prewired, isolated 4-20 mA output, graphite electrode & flow switch manifold mounted on pp panel, 5 ft cable.
Please click here to view and/or purchase the new replacement controller and to view literature.