Fireray Obscuration Filter 0209-02
Fireray Obscuration Filter 0209-02Replacement Obscuration Filter for UL sensitivity test on both projected and reflected Beam Smoke Detectors. Used with the Fireray 50R 100R 3000EExd.The Optical Beam Smoke Detector works on the principle of light obscuration. The photosensitive element of the Optical Beam Smoke Detector sees light produced by the Transmitter in a normal condition. The Receiver is calibrated to a pre-set sensitivity level based on a percentage of total obscuration. There are two general types of Optical Beam Smoke Detector - Projected and Reflective. The type used will be dictated by the installation and environment conditions and constraints.
