The Siemens HI921 heat detector represents advanced thermal sensing technology engineered for comprehensive fire detection in commercial and industrial environments. Combining both fixed-temperature and rate-of-rise (RoR) thermal sensing capabilities, this local-style detector provides sophisticated thermal event monitoring for critical infrastructure and life safety systems.
Designed for seamless integration with modern addressable fire alarm panels, the HI921 delivers precise thermal event detection across diverse architectural and mechanical spaces. Its robust construction enables reliable performance in challenging environmental conditions, including areas with potential temperature fluctuations such as mechanical rooms, warehouses, data centers, and industrial processing facilities.
Key Features
- Dual-criteria detection: Fixed-temperature and rate-of-rise thermal sensing for enhanced reliability
- Compatible with Siemens addressable fire alarm control panels and conventional systems
- UL 268 listed with rapid response thermal sensing elements
- Operating temperature range from 32°F to 100°F (0°C to 38°C)
- Low-profile design minimizing aesthetic interference with architectural spaces
- Plug-in base configuration enabling quick installation and maintenance
Specifications
- Static Activation Temperature: 135°F (57°C)
- Rate-of-Rise Threshold: 15°F per minute
- Operating Voltage: 15-32 VDC
- Current Draw: 250µA standby, 5mA alarm
- Dimensions: 4.25″ diameter, 2″ height
The HI921 meets rigorous compliance standards including NFPA 72 National Fire Alarm and Signaling Code, UL 268 Standard for Smoke Detectors for Fire Protective Signaling Systems, and UL 464 Audible Signal Appliances. Engineered for reliability, this heat detector provides critical thermal event detection for commercial facilities, ensuring comprehensive life safety protection across diverse environmental contexts.
For more information, contact the Life Safety Consultants team at (888) 557-0558, or email us at: sales@lifesafetycom.com
Additional information
| Weight | 1 lbs |
|---|---|
| Dimensions | 5 × 5 × 2 in |
| Condition | New |
| Manufacturers | Siemens |
| Part Type | Pull Station |
