Federal 3T22
The Federal 3T22 is a dual-tone, dual-rotor outdoor warning siren that was manufactured by Federal Sign and Signal Corporation. This siren's production run was from 1952-1990 but the siren can still be found in service with many U.S. Cities.
The Federal 2T22 and 3T22 are almost the same but with different signals. The 3T22 is capable of Alert, Attack, and a High-Low alternating signal with a set of dampers. By comparison, the 2T22 is only capable of Alert, and Attack tones, as it has no dampers.
The Federal 3T22 is rated 113db @ 100 ft.
The 3T22 has a total of 22 horns with 12 on the top row and 10 on the bottom row.
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