Model 3
| Model 3 | |
 | |
| Company | Federal Signal Corporation |
|---|---|
| Produced | ? - Mid 1950's |
| Type | Electromechanical |
| Sound output | ? dBc at 100 feet |
| Horsepower | 3 |
The Model 3 was a 3 horse power, mechanical, omni-directional siren produced by Federal Signal Corporation. It's essentially the smaller version of the Model 5. The rotor is 12 inches in diameter coming in 2 different port ratios: 12 and 8 port single tone. The siren was housed in a very simple enclosure that resembles an air vent found on building roofs.