Category:Rotating Sirens: Difference between revisions
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Sirens that have a narrow sound beam but rotate to cover more area | Sirens that have a narrow sound beam but rotate to cover more area. Rotating Sirens, known as Unidirectional Sirens, have three main rotator speeds, measured in Rotations per Minute, the speeds are 2 RPM, 4 RPM, and 8 RPM. | ||
Revision as of 02:03, 13 December 2013
Sirens that have a narrow sound beam but rotate to cover more area. Rotating Sirens, known as Unidirectional Sirens, have three main rotator speeds, measured in Rotations per Minute, the speeds are 2 RPM, 4 RPM, and 8 RPM.
Pages in category "Rotating Sirens"
The following 25 pages are in this category, out of 25 total.