WPH420-14NN, Walchem pH/ORP Controller (WPH420-14NN)

The Walchem WPH420-14NN controller is now obsolete and the closest equivalent is the WPH620PSNAN-NN controller. The new WPH600 series has upgraded features; for reference, here is the description of the old model:

proportional control outputs, 120 VAC, pre-wired with 6” pigtails (wph410) or with 10’ cables (wph420), single isolated analog (4-20 mA) output, none

Choose the new model on our WPH620PSNAN-NN page or select a model more suited to your needs from the WPH600 series controller or one of the other pH controllers.