The Walchem WPH420-14NN controller is now obsolete and has been replaced by the WPH420-14NU controller which now has integrated USB datalogging and software upgrade capability. Otherwise, both the WPH420-14NN and the WPH420-14NU have the same specifications with proportional control outputs, 120 VAC, pre-wired with 6” pigtails (wph410) or with 10’ cables (wph420), single isolated analog (4-20 mA) output, none.
Please click here to view and/or purchase the new replacement controller and to view literature.
