Features • ULC & UL Listed • Dual Action Rate of rise & fixed temperature • Detects Rate of ambient temperature rise of 8 Celsius degrees • Detectors operating on fixed temperature are only available in two settings of 135 o F or 200 o F • Clear-anodized aluminium finish The CR & CF series Heat Detectors provide reliable fire detection by responding to both Rate of tempera-ture increase as well as a preset temperature level. The CR series detectors incorporate both functions, while the CF series respond only when the preset temperature level is reached