FST-851AUS Series

FST-851AUS Series Heat Detectors. 

Notifier FST-851AUS Series intelligent plug-in thermal detectors with integral communication has features that surpass conventional detectors. Point ID capability allows each detector’s address to be set with decade address switches, providing exact detector locations. FST-851AUS Series thermal detectors use an thermistor sensing circuit to produce 57°C fixed-temperature (FST-851AUS) and rate-of-rise thermal detection (FST-851RAUS) and FST-851HAUS provides fixed high-temperature detection at 88°C.

These thermal detectors provide effective, intelligent property protection in a variety of applications. FST-851AUS Series detectors are compatible with Notifier Onyx and CLIP series Fire Alarm Control Panels (FACPs).


  • Sleek, low-profile stylish design.
  • Thermistor technology for fast response
  • Rate-of-rise model (FST-851RAUS), 8.3°C per minute
  • Fixed temperature at 57°C; high-temperature model fixed at 88°C
  • Compatible with FlashScan® and CLIP protocol systems
  • Rotary, decimal addressing
  • 360°-field viewing angle of the visual alarm indicators (two bi-color LEDs).
  • Integral communications and built-in device-type identification
  • Built-in functional test switch activated by external magnet
  • Built-in tamper-resistant feature
  • Sealed against back pressure
  • Plugs into separate base for ease of installation and maintenance

Created: Friday, 24 April 2020 13:28
Version: D
Size: 180.69 KB

FST-851AUS-IV: FlashScan fixed temperature thermal sensor - Ivory

FST-851RAUS-IV: FlashScan rate of rise thermal sensor - Ivory

FST-851AUS-W: FlashScan fixed temperature thermal sensor - White

FST-851RAUS-W: FlashScan rate of rise thermal sensor - White

FST-851HAUS-IV:FlashScan High Temperature fixed thermal sensor


B501AUS-IV: Universal addressable detector base, Ivory

B501AUS-W: Universal addressable detector base, Pure White

B524IEFT-IV: Universal addressable detector base with Isolator, Ivory

  • FST-851AUS - AS7240.5:2018 Class A2; ActivFire certificate # afp-3359
  • FST-851RAUS - AS7240.5:2018 Class A2R; ActivFire certificate # afp-3360
  • FST-851HAUS - AS7240.5:2018 Class C; ActivFire certificate # afp-3361