The THERMOFLEX? CF/CR Series standard heat detectors are available in single or multiple circuits with open or closed contact configurations. THERMOFLEX? CF/CR Series detectors are available in 135?F, 165?F, 200?F, and 285?F versions. THERMOFLEX? CR Series The CR Series detectors are combination Rate-of-Rise and Fixed Temperature. The Rate-of-Rise function allows the detector to operate when the temperature at the detector increases at a rate of 15?F per minute. The Fixed Temperature portion will cause the detector to operate when it reaches the applicable temperature. The Rate-of-Rise portion of the detector is restorable; however the Fixed Temperature portion is non-restorable.Main FeaturesAvailable in single or multiple circuit versionsProduct includes a 5 year warranty