The Walchem WDT410-5N6N controller is now obsolete and has been replaced by the WDT410-5N6U controller which now has integrated USB datalogging and software upgrade capability. Otherwise, both the WDT410-5N6N and the WDT410-5N6U have the same specifications with bleed, feed, 2 biocides, ph/ORP, & alarm, hardwired, cable glands, no 4-20 mA output, graphite electrode, ph electrode & tees (in-line or submersion), 20 ft cables.
Please click here to view and/or purchase the new replacement controller and to view literature.