Patent ID: 9024756
Filing Date: 2015-05-05
Classification: G08B

Abstract:
1. A system for detecting at least one material in an environment, the system comprising: at least one sensor adapted to measure a level of the at least one material in the environment surrounding the sensor; at least one notification device adapted to produce a repeating signal having a frequency and amplitude; a memory comprising a preprogrammed level of the at least one material in the environment; and means for programing a minimum notification level of the at least one material in the environment that is below the preprogrammed level; wherein the system is adapted to notify a user with the repeating signal if the level of the at least one material in the environment exceeds the minimum notification level by producing the repeating signal as long as the level exceeds the minimum notification level and changing the frequency and/or amplitude of the repeating signal in response to the level increasing and approaching the preprogrammed level.