The Walchem WDP320-122 controller is now obsolete and has been replaced by the WDP420-122U controller which now has integrated USB datalogging and software upgrade capability. Otherwise, both the WDP320-122 and the WDP420-122U have the same specifications with w/ 2 pulse proportional and 2 on/off 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, two submersion flat ph electrodes without auto temp comp.
Please click here to view and/or purchase the new replacement controller and to view literature.
