Exit stopper door alarm to be fixed to a fire door to prevent unauthorised use. The alarm unit is fixed to the top of the door and a reed switch is fitted to the doorway. When the two come apart, the alarm is set off.
Exit stopper door alarm to be fixed to a fire door to prevent unauthorised use. The alarm unit is fixed to the top of the door and a reed switch is fitted to the doorway. When the two come apart, the alarm is set off.