Siemens HI921 Thermal Heat Detector

The Siemens HI921 is an intelligent, addressable thermal heat detector designed for areas where smoke detection is unsuitable, such as kitchens, garages, and dusty environments. Field-programmable for rate-of-rise (15°F/min) or fixed-temperature response (135°F/57°C standard), it is UL 521 listed for open-area heat detection with built-in ISOtechnology isolation and a tri-color 360-degree status LED. Mounts on Model DB-11 series bases within the Cerberus PRO signaling line circuit.