St. Charles, IL - System Sensor's SpectrAlert Advance, the industry's newest, most refined series of audible/visible notification appliances, includes indoor and outdoor selectable-output horns and ...

System Sensor of St. Charles, Ill., has expanded its SpectrAlert Advance audible/visible notification appliance to include a line of mass notification system (MNS) devices and accessories. These ...

The SpectrAlert advance low-frequency sounders and sounder strobes by System Sensor of St. Charles, Ill., are the first notification appliances to meet the new NFPA 72 2010/2013 low-frequency ...

To predict intelligibility of a voice system, System Sensor SpectrAlert Advance speaker data is now available to model systems in EASE (Enhanced Acoustical Simulator for Engineers) software. EASE 4.3 ...