In high-ceiling buildings where the use of standard detectors is not feasible, especially in large-area compartments common to large shopping malls, in aircraft hangars, etc. Used in places.

The Relative Beam Type Smoke Detector works with the principle of emitting the reflector beam directly across the transponder in the optical block and measuring the signal length between the two lenses of the chamber. This is done only with view settings. The fire is very easily perceived because the beam of light is interrupted by smoke. The DLFB transmits an alarm signal and illuminates the red status indicator. The alarm remains in memory until it is reset.