HD29 Heat Detector

HD29 сonventional-addressable maximum differential Heat Detector is intended for fire detection with temperature rise inside the monitored closed rooms of various buildings and structures as well as for a “Fire” signal transition to the R3500 receiving and control panel.
Power supply from ACL (28 - 36 V)
Detector trip temperature from 54 to 70 °С
LED flashing frequency in stand-by / "Fire" mode 0,2 Hz/2 Hz
Detector overall dimensions of the with base, no more than Ø94 × 58 mm
Detector weight, including base, no more than 120 g
Operating temperature range from -30 to +55°С
Average service life, at least 10 years

The detector represents temperature direct measuring device with two ways of fire detection: by maximum temperature and by rate of temperature rise.


The detector performs the following functions:

  • ambient temperature measuring;
  • temperature change rate calculation;
  • measuring results processing using special algorithms and "Fire" signal transmission to receiving and control panel;
  • detector operation mode indication;
  • functioning test with a button or an OT-1 optical tester.

Power supply and data exchange of the detector is performed via a two-wire ACL. 

 The detector does not respond to humidity changes and to the presence of flame and natural or artificial light.

The detachable connection between the sensor and the base provides easy installation, mounting, and maintenance of the detector.

Circular contacts allow easy mounting of the detector without orientation with respect to the socket.

To facilitate ACL shielded cables installation, cable mounting plate is provided on the base (option).

It can be mounted on dropped ceiling using a special socket combined with mounting rings.


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