WDB400-5NNN, Walchem Boiler Controller (WDB400-5NNN)

The Walchem WDB400-5NNN controller is now obsolete and the closest equivalent is the WBL600 controller. The new WBL600 series has upgraded features; for reference, here is the description of the old model:

hardwired, cable glands, no 4-20 mA output, no electrodes, software upgrade capability only

Select a model from our WBL600 page or one of the other pH controllers.