WDB400-5NNU Walchem (WDB400-5NNU)
The Walchem WDB400-5NNU controller is now obsolete and the closest equivalent is the WBL600HSSNN-NN controller. The new WBL600 series has upgraded features; for reference, here is the description of the old model:
Dual boiler controller, hardwired, cable glands, no 4-20 mA output, no electrodes, integrated datalogging and config file import/export via USB flash stick.
Choose the new model on our WBL600HSSNN-NN page or select a model more suited to your needs from the WBL600 series controller or the more basic WBLW100 series controller.