If relevant, a releasing panel will activate relays to dispense pre-motion sprinkler units or special hazard suppression such as a chemical agent or drinking water mist onto the guarded Room. The SBBRKSM easichange® kit replaces the discontinued BRK 660MBX optical and 670MBX ionisation smoke alarms and suits onto your present https://www.firesense.co.uk/type/addressable-fire-system/addressable-fire-alarm-control-panels/