The Walchem WBL300-1N5 controller is now obsolete and has been replaced by the WBL400-1N5U controller which now has integrated USB datalogging and software upgrade capability. Otherwise, both the WBL300-1N5 and the WBL400-1N5U have the same specifications with two powered relays (one blowdown & one feed/alarm), 120 VAC, prewired, no 4-20 mA output, standard electrode (up to 250 psi).
Please click here to view and/or purchase the new replacement controller and to view literature.
