This acoustically
activated fire door retainer keeps a fire door open legally and closes the door in the event of an alarm. Activated after hearing a continuous sound exceeding 65 decibels. Door rele...
Gibraltar C11 door closer. Non handed maximum door weight - 68kg. Tested to withstand 500, 000 open and close cycles. Fire tested in accordance with EN1634-1 30 minutes and 60 minutes.