Sentry Defender
| Sentry Defender | |
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| Company | Sentry Siren Incorporated |
|---|---|
| Produced | 2004-2010/1 |
| Type | Electromechanical |
| Sound output | 127 |
The Defender was a rotating siren that was produced by Sentry Siren Incorporated. It was available in two different pitches, 460 Hz and 920 Hz. It was also able to be ordered in any color as well as a stainless steel option. It was discontinued because Sentry wanted to have an omnidirectional siren lineup.