The Walchem WDP310-5NN controller is now obsolete and has been replaced by the WDP410-5NNU controller which now has integrated USB datalogging and software upgrade capability. Otherwise, both the WDP310-5NN and the WDP410-5NNU have the same specifications with with 4 on/off control outputs and diagnostic alarm relay, hardwired, cable glands, no 4-20 mA output, no electrode.
Please click here to view and/or purchase the new replacement controller and to view literature.
