Gas detector

The utility model relates to a fuel gas detector, which comprises a shell, a PCB (printed circuit board), a detection device, a camera, an alarm device and a wireless device, and is characterized in that the shell is provided with an air inlet hole, and the PCB is arranged in the shell; the detection device is arranged on the PCB and is electrically connected with the PCB; the camera is arranged on the PCB and is electrically connected with the PCB; the alarm device is arranged on the PCB and electrically connected with the PCB, and the alarm device can give an alarm when the detection device and the camera detect abnormity; the wireless device is arranged on the PCB and electrically connected with the PCB, and the wireless device can send signals to external equipment when the detection device and the camera detect abnormity. According to the gas detector, internal elements can be protected, meanwhile, synchronous detection of multiple detection modes is achieved through the detection device and the camera,