The Walchem WDEC310-14GN controller is now obsolete and has been replaced by the WDEC410-14GNU controller which now has integrated USB datalogging and software upgrade capability. Otherwise, both the WDEC310-14GN and the WDEC410-14GNU have the same specifications with 120 VAC, prewired, single isolated analog (4-20 mA) output, submersion CPVC sensor (1.0 - 10.0 ms/cm, 20 ft cable), no second sensor.
Please click here to view and/or purchase the new replacement controller and to view literature.