The Walchem WDP410-521N controller is now obsolete and has been replaced by the WDP410-521U controller which now has integrated USB datalogging and software upgrade capability. Otherwise, both the WDP410-521N and the WDP410-521U have the same specifications with with 4 on/off control outputs and diagnostic alarm relay, hardwired, cable glands, two isolated analog (4-20 mA) outputs, two preamplifiers (190783) w/10 ft. cables, prewired.
Please click here to view and/or purchase the new replacement controller and to view literature.
