Discovery Ionisation Smoke Detector

Product Overview

The Discovery Ionisation Smoke Detector uses a low activity radioactive foil to irradiate the air in the smoke chamber causing a current flow. If smoke enters the chamber, the current flow is reduced leading to an alarm.


  • Responds well to fast-burning, flaming fires
  • Designed to operate in a variety of environments
  • Remote test feature


Approvals: AS7240-7


Voltage 17-28 VDC
Quiescent Current 500μA at 24 VDC
Alarm Current 3.5mA 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 IP43
Weight (inc base) 160 grams


Item Numbers

4106-2006 Discovery Ionisation Smoke Detector