Fireray Obscuration Filter 0209-02

Fireray Obscuration Filter 0209-02

Replacement 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.