The Walchem WM18 WebMaster controller is now obsolete and is replaced by the WCN600 or WIN900 series controller. The new series have different features; for reference, here is the description of the old model:
WebMaster Mixed Purpose Controllers / Monitors
Up to 12 digital inputs
Up to 8 analog inputs
Up to 4 analog outputs
8 on/off relays
Conductivity, pH, ORP, Cl, ClO2
Ethernet/USB/land modem/cell modem communications
NEMA 4X enclosure
No proprietary software needed to view data or edit PLC programming logic
The data handling and communications options in WebMaster® are truly innovative. Ethernet and USB are standard features, so local or plant networked PCs can be connected and communicating with WebMaster® in true Plug and Play fashion. Authorized operators and quality control personnel can view live system parameters and historical graphs, as well as receive emailed alarms, reports or datalog files.
WebMaster® has been designed with convenience and ease of use in mind. It has extensive built-in data logging capability so there's no need for a separate data logging device. The data can be retrieved automatically, or manually through the convenience of a standard flash disk.