Signature Series Detector Features:
True multisensor technology means that a single device can perform optimally under a wider range of conditions than any single sensor detector. Signature Series detectors accomplish this by means of an on-board microprocessor that constantly monitors the state of the sensor. Using a sophisticated algorithm, the microprocessor effectively distinguishes between a legitimate change of state and a non-threatening situation that would otherwise lead to a false alarm. Photoelectric and ion detectors see smoke, but not all fires produce it. Heat detectors spot temperature changes, but these aren't always an indicator of a life-threatening event. Multisensor devices, however, collect data on several different environmental parameters at the same time, and then weigh the results to determine whether an alarm should be sent to the control panel.
All Signature detectors feature analog technology which allows them to gather information continuously concerning the state of their sensors and track the results over time. Signature Series detectors have been singled out by UL as the only such devices on the market that do not require a calibration sensitivity test in order to comply with NFPA72.