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Edwards EST SIGA-HRD Intelligent Fixed Temperature/ Rate-of-Rise Heat Detector

Edwards EST SIGA-HRD Intelligent Fixed Temperature/ Rate-of-Rise Heat Detector



The Signature Series smoke detectors bring advanced sensing technology to a practical design that increases efficiency, saves installation time, cuts costs, and extends property protection capabilities. Continuous self-diagnostics ensure reliability over the long-haul, while the latest thermister technology makes these detectors ideal wherever dependable heat detection is required. The SIGA-HRD is an intelligent fixed temperature/rate-of-rise fire detector. It monitors the temperature of the surrounding air and analyzes the data from the sensor to determine whether to initiate an alarm. The rate-of-rise heat function quickly detects a fast, flaming fire. The fixed-temperature heat function detects fire when the air temperature near the detector exceeds the alarm point.


Standard Features

Note: Some features described here may not be supported by all control systems. Check your control panel’s Installation and Operation Guide for details.


  • Next Generation Heat Sensing Technology
  • 135 °F (57 °C) fixed temperature alarm point (HRD and HFD)
  • 15 °F (9 °C) per minute rate-of-rise alarm point (HRD)
  • Uses existing wiring
  • Automatic device mapping
  • Sensor Markings Provide Easy Testing Identification
  • Up To 250 Total Signature Devices Per Loop
  • Non-volatile memory
  • Electronic addressing
  • Bicolor (green/red) status LED
  • Standard, relay, fault isolator, and audible mounting bases
  • 50 foot (15.2 meters) spacing



The SIGA-HRD combination fixed temperature/rate-of-rise heat detector provides a 15 °F (9 °C) per minute rate-of-rise heat sensor for the detection of fast-developing fires, as well as a 135°F(57°C) fixed temperature sensor for slow building-fires. The SIGAHFDfixed temperature detector provides a 135°F (57°C) fixed temperature sensor for slow building-fires.


Signature Series heat detectors are compatible only with the Signature Loop Controller.



Signature Series detectors mount to North American 1-gang boxes,3-1/2 inch or 4 inch octagon boxes, and to 4 inch square electrical boxes 1-1/2 inches(38 mm) deep. They mount to European BESA and 1-gang boxes with 60.3 mm fixing centres. See mounting base installation and wiring for more information.

12 months warranty

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