Patent ID: 9082275
Filing Date: 2015-07-14
Classification: G08B

Abstract:
1. An alarm device for alerting hazardous conditions in a building, comprising a motion detection module arranged to generate a motion detection signal where motion is detected within a detection zone, a primary sensing module arranged to generate an alarm signal where the primary sensing module senses a hazardous condition at or over a preset level, at least one secondary sensing module arranged to generate an alarm signal where the secondary sensing module senses a hazardous condition at or over a preset level, and a controller arranged to activate an audible alarm module on receiving any of said alarm signals in a normal state of operation, the controller having a timer and being arranged to transfer from said normal state to a hush state of operation for a preset time period upon receiving said motion signal, and in said hush state the controller being arranged to activate the audible alarm module upon receiving alarm signals from both the primary and the at least one secondary sensing modules, or from either the primary or any one of said at least one secondary sensing modules.