The Walchem W900 Series controller gives complete control of chemical metering pumps and valves in a broad range of water treatment applications. With easy, icon-based programming on the large touch-screen display, the W900 can be configured to control multiple outputs using one of many pre-engineered algorithms. Four I/O slots permit flexibility to utilize almost any type of sensor, including pH/ORP, conductivity, disinfection, fluorescence, temperature, level, and flow. Internet connectivity allows for control via remote access. 508-429-1110; www.walchem.com