Series 65 Integrating Smoke Detector

Product Overview

Ionisation Detectors use a low activity radioactive foil to detect fires by irradiating the air in the smoke chambers and causing a current flow. If smoke enters the chamber, the current flow is reduced leading to an alarm. Circuitry in the Ionisation Smoke Detector protects against transient levels of smoke above the normal threshold for up to 20 seconds.


  • Responds well to fast-burning, flaming fires
  • Designed to operate in environments where transient levels of smoke may be expected
  • Wide operating voltage
  • Flashing LED and magnet operated test switch option




Voltage 9-33 VDC
Quiescent Current 20-45µA at 24 VDC
Alarm Current 52mA at 24 VDC
Size (inc Base) 100mm Dia x 50mm H
Operating Temperature -20°C to +60°C (no icing)
Relative Humidity 0 to 95% (non condensing)
IP Rating IP32D (EN60529)
Weight (inc Base) 153 grams


Item Numbers

55000-220AMP Series 65 Intergrating Ionisation Smoke Detector