ARITECH FIRE DB950 990 Series Detector Base

Base for 990 series detectors

The DP 951 optical smoke detector is equipped with an internal pulsing LED and an obtuse-angle photodiode. In clear air, the photodiode in the monitor does not receive light from the LED and produces a corresponding analog signal. This signal increases when smoke enters the chamber and the light is scattered on the photodiode. The signal is processed by the electronic circuit and transmitted to the control equipment exactly as in the case of the ionization smoke detector