Description
Fire alarm strobe sounder ,The sounder VAD (visual alarm device) for conventional fire alarm systems is a red, durable sounder beacon that is certified to EN54-23 and ensures reliability and energy efficiency.
It is Preferable to use multiple quieter sounders to achieve the required sound level, rather than a smaller number of loud devices. This is to prevent points of excessive volume, which may lead to disorientation or damage to hearing. Two sounder providing equal sound levels will combine to add 3dB(A) to the SPL.
Fire alarm strobe sounder ,Visual alarms are required in order to satisfy the Disability Discrimination Act (DDA) as well as being used in areas of high background noise where hearing protection is likely to be worn. Just as audible alarms should be placed through all accessible areas of a building, visual alarms should be placed such that they can be seen in order to alert the hearing impaired.
Visual alarms should be clearly distinguishable from other warning lights, preferably red and should flash at a rate of 30 to 130 flashes per minute. The recommended mounting height is above 2.1m; however they should not be mounted closer than 150mm from the ceiling. They should be positioned so that any alarm is clearly visible from all locations within the area protected.
The strobe horn fire alarm is a kind of terminal device for alarm; it is used for the sound & light alarm when the fire happens.
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