ROLP/R/S/3 Roshni Red 32 Tone Electronic Sounder – 9 28 V dc. Roshni range of sounders are considered to be the market leaders for fire alarms, they are also used in a multitude of wider applications within an industrial and commercial environment such as intruder and industrial signalling. Roshni process sounders operate from either a low voltage AC or a DC supply without modification.
