Sentry: CLEANGUARD™ Extinguishers are designed for the protection of commercial and industrial facilities traditionally protected by HALON 1211. Typically, these are areas that contain sensitive or irreplaceable equipment, which could be damaged or destroyed by water, foam, dry chemical, or carbon dioxide. Typical applications include computer centers, data/document storage areas, communications facilities, control rooms, electronics manufacturing, museums, art galleries, laboratories, and many others. The CleanGuard extinguishers have a discharge time of up to 15 seconds and have an effective discharge range up 15 feet. CleanGuard extinguishers are an “In Addition To” standard Dry Chemical Extinguishers and cannot be used as a replacement for a standard Dry Chemical Extinguisher.