DOT1151A-EX AlgoRex InterActive Neural Smoke Detector EX Rated

The PolyRex detector DOT1151-Ex is equipped with efficient algorithms for discriminating between true fires and deceptive phenomena. To signal a danger level the detector does not simply respond to a reading above a «response threshold», but rather tracks the smoke density pattern over a longer period of time and evaluates it with appropriate algorithms. The software parameters determine the response behavior of the detectors. They are de- pendent on the risk prevailing at the installation site (on the selected parameter set) and on the activated operating mode (day, night, special [renovation], test and switched off). The current operating mode is signalled to the detectors by the control unit in intervals of approx. 3 seconds.

The algorithms contain, for example, filters for suppressing transient interference vari- ables. Slow changes caused by contamination are compensated by the automatic digital compensation circuit. This extremely slow compensation ensures that also slowly develop- ing fires are reliably detected.