Abstract: A method of steps and a system of components which detects and responds to smoke, CO, and/or fire hazard emergency alarm signals (loud audio noise and/or bright strobe lights) and then provides a shut-off of electrical power and/or fuel gas (e.g. natural gas or propane) as well as other types of power and energy for safety's sake. The present invention is improved over the current product offerings and state of the art through increasing the reliability of alarm signal detection by utilizing redundancy and providing primary and backup sensor functionality for both of the possible commonly intended alarm signal outputs instead of monitoring for just one. This invention also includes a method of steps and a system which further improves reliability by adding additional redundancy and backups through detecting and responding to the unobvious but real by-product alarm signals which are: 1. the vibration of the audible alarm mechanism and 2. the electricity flowing in or to the activated alarm.