The Series 900 RTU Valve Controller is designed to control a single valve to control water at a remote location to keep a storage tank full or to control the system pressure. The inputs to the controller can be level, pressure, or flow. The controller will provide OPEN/CLOSE commands for the valve. If a variable action valve is used, the controller can provide an analog output signal for variable control. An operator interface terminal is used to read system parameters and insert new setpoint values.

A Remote Terminal Unit (RTU) provides the SCADA master station with remote monitoring and control capabilities by transmitting and receiving over commonly available communications media – 2-wire circuits, dedicated phone lines, DSL, radio, wireless, etc. Licensed radios in the VHF, UHF, and 900 MHz bands are utilized as well as non-licensed spread spectrum and Ethernet radios.