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Wireless Fixed Heat Detector
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Honeywells 5809 Series wireless fixed heat and rate-of-rise temperature sensors offer expanded fire detection and installation flexibility. They are ideal for hard-to-wire locations and applications that require more than smoke detection. This is a fast and easy install with no wires to run.

Both the 5809FXT and 5809SS contain a built-in fixed temperature sensor, which will signal an alarm if the environmental temperature rises above 135 degree F. The 5809SS also incorporates an additional rate-of-rise temperature sensor. Fires typically cause a rapid rise in temperature in the surrounding area. The 5809SS rate-of-rise thermostat senses the rise in temperature and signals an alarm if the increase is 15 degree F or more per minute. The 5809 Series is UL Listed (UL 521) and CSFM approved for commercial and residential applications.


  • Contain s a built-in transmitter which can send alarm, supervisory and battery condition messages to the systems receiver/control unit
  • Powered by a three-volt lithium battery. If the battery voltage gets too low, the 5809 sends a low battery signal to the control panel
  • Features a tamper switch, which causes a trouble signal to be sent to the control if the unit is removed from the mounting base
  • UL Listed for Commercial (when using 5881EH Receiver) or Residential applications


Dimensions4.5" Diameter , 2.5" Depth
Battery3V lithium (Duracell DL123A, Panasonic CR123A, HUIDERUI CR123A)
Operating temperature40?F to 135?F (4?C to 57?C)
Rate-of-rise temperature15?F (8?C) increase per minute (NOTE: Rate-of-rise sensor (5809SS only) does not operate above 38?C)
Fixed temperature135?F (57?C)
Maximum spacing50 ft x 50 ft UL, 30 ft x 30 ft FM (refer to National Fire Alarm Code Standard NFPA 72 for application requirements)
Input Voltage Range3 VDC
Form FactorCeiling Mount, Wall Mount
Weight0.8 lbs