Heat Detector (Model 55000-4501IMC)


The heat detector has a common profile with optical smoke detector but has a lower air flow resistance case made of self extinguishing white polycarbonate.

They monitor temperature by using a single thermistor network which provides a voltage output proportional to the external air temperature.

To provide a device for use in ambient temperature up to 55°C, a temperature detector is also available. This has similar characteristics to the standard temperature detector at 25°C but reaches a 55 count (alarm) at 90°C.

  • Supply voltage from 17 to 28 Volts DC
  • Quiescent current at 250µA average, 500µA peak, surge current at 1mA
  • Two wire supply of polarity insensitive
  • Operating temperature range from -20°C to +70°C
  • Red light emitting diode (LED) as alarm indicator
  • Sensitivity range from 25°C to 90°C ( 1°C/Count; -20°C returns to 8 counts)
  • 0% to 95% relative humidity with no condensation or icing
  • IP rating of 53
  • 100mm (Diameter) x 42mm (Height)
  • 105g
Supply Voltage 17-28V DC
Quiescent Current 250µA average, 500µA peak
Surge Current 1mA
Operating Temperature –20°C to +70°C
Humidity (no condensation) 0–95% RH
IP rating 53
Dimensions 100 (D) x 42 (H) mm
Weight 105g

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