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In September 2008 we finally had to say a sad farewell to the traditional RVB4100 series siren as a manufactured product. Forced component changes, moderate weather resistance, and an inherent design requirement for periodic servicing meant that the 1940's design was finally feeling its age and feedback encouraged the development of a more modern equivalent.

We've now superseded the RVB4100CT with the 4100E range, an electronic siren with easy maintenance features, volume control and IP66 weather proofing built in. The original sounds from the 4100CT sirens have been embedded into an onboard microchip to maintain as much of the authentic tone as can be achieved.