The Walchem WECTWEDT series controller is now obsolete and has been replaced by the WCT600 series controller. The new series has upgraded features; for reference, here is the description of the old series:
Electrodeless Cooling Tower Controller: Single or Dual
Single or Dual System Electrodeless Cooling Tower Controller. With optional biocide addition, optional conductivity sensor, optional pH or ORP electrode, two analog outputs and six on/off relays.
