System Sensorhas developed the Equivalent Facilitation Web-based calculator in an effort to provide architects and engineers with easy access to a tool that will assist in the design of audible/visible notification device circuits. By visitingwww.systemsensor.comand then selecting the Install/Specify System Sensor Products tab or going directly to, visitors are able to perform notification circuit design calculations by entering ceiling strobe candela values and inputting the longest wall and the ceiling height of the room.