A faded 3V8
A red 3V8
A yellow 3V8
A white and red 3V8
The 3V8 Is a Omnidirectional Mechanical Siren by Darley, and eventually, Sentry.
A Darley 3V8
On the Sentry Siren Website it Says:
A power packed, entry-level siren, the 3V8 is our first step into large scale warning sirens. With its low power demands, this compact siren is meant for spot signaling or as the go-to product for industrial warning sirens. Designed for single siren installations, this siren is FEMA and USDA grant compliant. This 5 Horsepower performer is rated at 107 dB(c) @ 100 ft. continuous*, not just for 25% of its cycle time, like its rotating competitors. The 107 dB measurement is for 100% of its full volume run time. This 107 dB is produced in a 460 Hz tone, the lowest pitch in the industry; meaning its sound will fade at a lower rate than its competitors, giving the user more distance per decibel. This pitch has been shown to stand up to wind fade and tree cover better than its high pitch competitors. Plus, its projection skirt is meant for projecting sound down and flooding the immediate vicinity with intense warning signals. The 3V8 is the leading product for industrial warning sirens.