| 摘要 |
Systems and methods thereof for detecting at least one material in an environment prior to the environment reaching levels deemed dangerous by conventional monitors and standards includes 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 signal, and a memory comprising a preprogrammed level of the at least one material in the environment. The system is programmed with a minimum notification level of the at least one material in the environment that is below the preprogrammed level and is adapted to notify a user with the signal if the level exceeds the minimum notification level. The frequency and/or amplitude of the signal is changed as the level approaches the preprogrammed level. |
