Abstract: One embodiment (FIGS. 1A-1E) of smart electrical power outlets combined with gas detection capability and of type that plugs into another electrical power outlet. The flow of electrical energy from a power inlet plug (114) to power outlets (102a, 102b) can be, depending on user configuration, turned on or turned off when a hazardous gas is detected by a gas sensor (150). The embodiment is a versatile device that can be installed in any location where a power outlet is available, and the device can be used to power other electrical devices such as ventilation fans or gas shut-off valve. In addition, a wireless communication module (140) is included so that an alert message can be sent to the user when a gas leak is detected. The embodiment also provides audio and visual alerts through an LED (110) and loudspeaker (136). Other embodiments are described and shown.