Optima® Electronic Soap Dispensers (ESD) with automatic sensor operation are now available from Sloan Valve Co. Sloan's ESD-200 hardwire transformer model is designed for fast plug-in installations, and the ESD-250 battery-powered model allows for quick one-trade installations and retrofits. Both models encourage hygienic handwashing and are supplied with an 800-ml. soap cartridge that can be easily installed and refilled. Sloan's ESD Series is chrome-plated with a cast-brass body, brass shank and optional special finishes. Sloan Valve Co. Circle 15.