Series 65 Heat Detector

Product Overview

The Series 65 Heat Detector monitors temperature by using a dual thermistor network which provides a voltage output proportional to the external air temperature. There are four classes of heat detectors in the Series 65 range designed to suit a wide variety of operating conditions.


  • Can be used for applications where smoke detectors are unsuitable.
  • Ideal in environments that are dirty or smokey under normal conditions.
  • Wide operating voltage.
  • Flashing LED and magnet operated test switch option.



Voltage 9-33 VDC
Quiescent Current 45µA at 24 VDC
Alarm Current 52mA at 24 VDC
Size (inc Base) 100mm Dia x 50mm H
Operating Temperature -20°C to +90°C (no icing)
Relative Humidity 0% to 95% (non condensing)
IP Rating IP23D (EN60529)
Weight (inc Base) 131 grams


Item Numbers

55000-122AMP Series 65 A1R (50°C) Heat Detector – Rate of Rise
55000-127AMP Series 65 BR (65°C) Heat Detector – Rate of Rise
55000-132AMP Series 65 CR (80°C) Heat Detector – Rate of Rise
55000-137AMP Series 65 CS (80°C) Heat Detector – Static