The Walchem WDP440-12NN controller is now obsolete and has been replaced by the WDP440-12NU controller which now has integrated USB datalogging and software upgrade capability. Otherwise, both the WDP440-12NN and the WDP440-12NU have the same specifications with with 4 pulse proportional control outputs and diagnostic alarm relay, 120 VAC, pre-wired with 6” pigtails (if on/off) or with 10’ cables for e-class pumps (if pulse), two isolated analog (4-20 mA) outputs, no electrode.
Please click here to view and/or purchase the new replacement controller and to view literature.
