The Walchem WPH410-5N2N controller is now obsolete and has been replaced by the WPH410-5N2U controller which now has integrated USB datalogging and software upgrade capability. Otherwise, both the WPH410-5N2N and the WPH410-5N2U have the same specifications with on/off control outputs, hardwired, cable glands, no 4-20 mA output, submersion flat ph electrode w/preamp (wel-phf-21).
Please click here to view and/or purchase the new replacement controller and to view literature.
