The Cyclone was designed in 1968 by Jim Biersach. It is an omni directional, dual tone siren that was primarily intended for Civil Defense warning purposes, but was and is currently used for other outdoor warning purposes.
The first version of the Cyclone was called the Cyclone 120. This siren used a 40-horsepower motor, and produced a sound output of 120 dB at a distance of 100 ft.
In 1980, the Cyclone was redesigned and renamed the Cyclone 125. It received a new rotor/stator assembly and a new 50 horsepower motor. These changes raised sound output to 125 dB at 100 feet. The Cyclone 125 also featured some cosmetic changes to accommodate the new rotor/stator and motor.