Optical Smoke Detector (Model 55000-600IMC)


The Optical Smoke Detector has a moulded extinguishing white polycarbonate case with wind resistant smoke inlets and is distinguished by the indicator LED which is clear in standby and red in alarm. Within the case is printed circuit board which, on one side has the light proof labyrinth chamber with integral gauze surrounding the optical measuring system and on the other, the address capture, signal processing and communications electronics.

An infrared light emitting diode within its collimator is arranged at an obtuse angle to the photo-diode. The photo-diode has an integral daylight blocking filter.

  • Supply voltage from 17 to 28 Volts DC
  • Quiescent current at 340µA average, 600µA peak surge current at 1mA
  • Two wire supply of polarity insensitive
  • Operating temperature range from -20°C to +60°C
  • Clear LED emitting red light as alarm indicator
  • Sensitivity to nominal threshold of 2.4% light grey smoke obscuration per meter
  • 0% to 95% relative humidity with no condensation or icing
  • IP rating of 43
  • 100mm (Diameter) x 42mm (Height)
  • 105g
Supply Voltage 17 to 28 Volt dc
Quiescent Current 340µA average, 600µA peak surge current at 1mA
Operating Temperature -20°C to +60°C
Alarm Indicator Clear light emitting diode (LED) emitting red light
Sensitivity Nominal threshold of 2.4% light grey smoke obscuration per metre
Humidity (No Condensation or Icing) 0% to 95% relative humidity
Dimensions (Diameter x Height) 100 x 42 mm (Detector)
100 x 50 mm (Detector in Base)
Weight 105g (Detector)
157g (Detector in Base)

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