The Walchem WPH420-34NN controller is now obsolete and has been replaced by the WPH420-34NU controller which now has integrated USB datalogging and software upgrade capability. Otherwise, both the WPH420-34NN and the WPH420-34NU have the same specifications with proportional control outputs, 120 VAC, pre-wired wph420 with 10’ cables, with (2) e90495 connectors for ew pumps, single isolated analog (4-20 mA) output, none.
Please click here to view and/or purchase the new replacement controller and to view literature.
