Apollo Series XP95 Heat Detector A2S Analogue Addressable (55°C), Apollo 55000-400APO

Model No. FX444
Availability: Usually 2 - 3 Days


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The Apollo 55000-400APO XP95 Heat Detector (A2S) monitors temperature by using a single thermistor which provides a count output proportional to the external air temperature, reporting an alarm at 55°C. The device monitors heat using a single thermistor network which provides a voltage output proportional to the external air temperature. 

Note: this is the heat detector only; the mounting base needs to be ordered separately.

Apollo Series XP95 Heat Detector A2S Analogue Addressable - Features

  • Reliable fire detection in areas with a wide temperature range from -20°C to +70°C
  • Ideal for environments that are dirty or smoky under normal circumstances
  • Unaffected by wind and atmospheric pressure
  • Applications: Car parks/loading bays, Dusty environments, Warehouses, Hotels, Medium to large buildings, Offices, Restaurants, Retail, Cafes, Small to medium buildings, University campuses
  • Fire types: Fast burning, flaming fires
  • Warranty: 10 year manufacturer warranty

Apollo Series XP95 Heat Detector A2S Analogue Addressable - Specs

  • Detection rinciple: Linear approximation over temperature range 25degC to 90degC
  • Sensor: Single NTC thermistor
  • Sampling frequency: Continuous
  • Supply wiring: Two wire supply, polarity insensitive


  • Heat classification: A2S
  • Analogue value nominal: 25
  • Analogue value (- tolerance): 2
  • Analogue value (+ tolerance): 2
  • Analogue value: 25 +2/-2
  • Alarm level analogue value: 55


  • Finish: white
  • Weight: 105g
  • Material housing: White flame retardant polycarbonate
  • Material terminals: Nickel plated stainless steel
  • Dimensions: 100mm diameter, 42mm length


  • Standards: EN 54-5
  • Approvals: CPR, KRS, LPCB


  • Protocol voltage: 5 to 9V peak to peak
  • Protocol voltage (max): 9W
  • Protocol voltage (min): 5V
  • Power-up surge current: 1mA
  • Maximum power-up time: 4 seconds
  • Status indicator - Alarm: Red
  • Status indicator - Fault: Off
  • Quiescent current: 250μA
  • Quiescent current tested at: 24V dc
  • Supply voltage (max): 28V dc
  • Supply voltage (min): 17V dc
  • Supply voltage (Vmin-Vmax): 17 to 28V dc
  • Terminal functions L2: +L2 Loop in & out positive, double terminal
  • Terminal functions L1 in: -L1 in Loop in & out, double terminal
  • Terminal functions +R: +R Remote indicator positive connection
  • Terminal functions -R: -R Remote indicator negative connection
  • Polarity: L1 & L2 are polarity insensitive
  • Battery powered: No


  • Humidity (max): 95% RH
  • Humidity (min): 0% RH
  • Humidity Note: no condensation or icing
  • Humidity: 0% to 95% (no condensation or icing)
  • Operating temperature: -20 to 70°C
  • Operating temperature (max): 70°C
  • Operating temperature (min): -20°C
  • IP rating Value: IP53 rated
  • Storage temperature (max): 80°C
  • Storage temperature (min): -30°C
  • Storage temperature: -30 to 80°C

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