The Federal Signal 3T22 and 2T22 are dual-tone, mechanical outdoor warning sirens made by Federal Signal Corporation (formerly Federal Sign and Signal Corporation) from 1952 through the early 1990s. Both have a very recognizable design, with a ten-port rotor (chopper) on the bottom with ten cones (horns) and a 12-port one on top with twelve cones.

Federal 3T22 The Federal 2T22 siren is a dual tone siren, which is essentially one siren on top of another siren with the siren motor in the middle. Federal added air valves to each air intake of the top and bottom parts of the 2T22 siren to make it possible to alternately (or simultaneously) shut off the air to each air intake of the siren.

Federal 3T22. The Federal 2T22 siren is a dual tone siren, which is made up of one 12 port siren (high tone) on top of another 10 port (low tone) siren with the electric motor in the middle.

2025年1月5日 · The Model 2T22 and Model 3T22 (2 or 3 Tone, 22 horns/ports) are a pair of dual rotor omnidirectional sirens that were produced by Federal Signal over a span of nearly 40 years. These are some of the most well-known and iconic sirens with a distinctive sound and are still commonly found today.

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3T22 is short for 3 T one, 22 horns/ports. The 3 in the 3T22's name stands for the three signals it would do, being attack, alert, and hi-lo. The stand used can be removed for more mounting possibilities. The 3T22 came before the 2T22, released in 1955. It was produced until 1992.

2024年8月27日 · This 3T22 a friend got a drone photo of the tag, although it was just past sunset so could possibly get a better during the daylight. Was not able to read any numbers with the current photos we have. You do not have the required permissions to view the …

3T22 outdoor warning siren model manufactured by Federal Signal Corporation ...

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