The Walchem WDC300-125 controller is now obsolete and has been replaced by the WDC400-125U controller which now has integrated USB datalogging and software upgrade capability. Otherwise, both the WDC300-125 and the WDC400-125U have the same specifications with dual condensate monitor, 120 VAC, prewired, two isolated analog (4-20 mA) outputs, two standard electrodes (up to 250 psi).
Please click here to view and/or purchase the new replacement controller and to view literature.