This allows the detector to be a sensor of actual fire conditions, rather than to report a condition that may not be a real fire. Along the same concept as algorithm-type detectors are detectors that incorporate multiple detection principles to determine whether a fire is actually present. Using pre-described algorithms and multiple detection principles, a detector can determine if the type of products of combustion and the condition they are sensing fit an actual or real fire scenario. These detectors can use ionization, photoelectric, heat and time values or any combination to confirm the conditions within the room or area being detected fit a fire scenario. Since actual fires do not fit one type of scenario, these types of detectors can sense and detect multiple scenarios fires may produce.
Fires occur under various conditions, typically based upon fuel loads and ignition sources.
Since these conditions cannot be controlled, the use of multiple detection principles can be more reliable in sensing fires. Since all types of principles are incorporated, any fire scenario can be detected. Fire alarm systems are needed in order to provide life safety to building occupants and for responding personnel to determine the location of an alarm. The more reliable and useful the information, the better these systems are. Systems that can reduce false alarms are more reliable since they can better detect actual fires rather than produce alarms that may or may not be a fire condition.