The Apollo Series 65 55000-220 is an integrating ionization smoke detector. The Apollo 55000-220 uses a low activity radioactive sensor foil which detects fires by irradiating the air in the smoke chamber and causes a current flow. When smokes enters the chamber of the Apollo 55000-220, the current flow is reduced which leads to an alarm.
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