History
In 1971, Space Age introduced the first visual notification appliance, the AV32 light plate. They used relabeled Federal Vibratone 450D's for their series of 2DCD horns, which were often used with the AV32. These would also be used with horns made by other companies, generally Wheelock, Federal Signal, Faraday or Simplex models. Along with the AV32, they also introduced the V33 remote light, for situations where a retrofit would not be possible or no audible appliance was necessary. Sometime in the late 80's, Space Age introduced strobe versions of the AV32 and V33. Instead of using a dim incandescent light, it used a xenon strobe with a clear lens. The VA-series notification appliances were introduced in 1994, and ultimately replaced the AV32 series, which continued to be made until 1997. However, the V33 continued to be manufactured for general signaling purposes, and was replaced in 2006 by the Guardian Light.
Read more about this topic: Space Age Electronics
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