Chlorinators Incorporated offers the Regal series 7000 SmartValve”, a highly sophisticated flow-proportional control valve for use wherever chlorine or sulfur dioxide is needed to treat varying water flow rates. The unit uses state-of-the-art electronics, including a bright polymer LED display. Adjustable low-flow alarm circuitry and relay alert operators to problems. The valve feeds chlorine, sulfur dioxide or ammonia gas and can be configured to operate in either flow-proportional or step-rate control modes. It can be field-operated in one of four ways: fully automatic, electric/manual and two manual methods.www.regalchlorinators.comchlorinc@aol.com