The Walchem WDP320-122 controller is now obsolete and has been replaced by the WDP420-122U controller which now has integrated USB datalogging and software upgrade capability.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 2 pulse proportional outputs and 2 on/off dry contact relays and 1 dry contact dedicated alarm, 120 VAC, pre-wired with two 10’ cables for EH metering pumps, 2 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.
