WPH420-3NNN, Walchem pH/ORP Controller (WPH420-3NNN)

The Walchem WPH420-3NNN controller is now obsolete and the closest equivalent is the WPH620PSNNN-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 wph420 with 10’ cables, with (2) e90495 connectors for ew pumps, no 4-20 mA output, none

Choose the new model on our WPH620PSNNN-NN page or select a model more suited to your needs from the WPH600 series controller or one of the other pH controllers.