These devices are generally put in in structures along with other structures to warn occupants to your presence of a fire also to facilitate evacuation. Dr Zzeus Q&A: If hearth alarm indicator products do not satisfy the demanded requirements, could be the technique compliant? Tactile Alarms: Benefit from Bodily sensations, https://www.firesense.co.uk/type/conventional-fire-system/conventional-sounders-vids-vads/