Toxic gas and fire alarm sensor

The invention discloses a toxic gas and fire alarm sensor. The sensor comprises a sparkling light, an inner seal edge, a wing sheet, an air flow hole, an air flow guide-in plate, a heat detection element, an air inlet and a comprehensive processor. A detection device fixed frame is arranged on the outer sides of a fire alarm sensor and a gas detector. A fixed screw is connected with the detection device fixed frame and the comprehensive processor. The fire alarm sensor is connected with a fire alarm detector fixed plate. The wing sheet is connected with the fire alarm sensor and the air flow guide-in plate. The gas detector fixed plate is fixedly connected with the detection device fixed frame. The gas detector is connected with the gas detector fixed plate. A sensing line is connected with the comprehensive processor. According to the invention, wall occupation area is greatly reduced; device size is quite small, thereby facilitating use of the device; environment where the device is located can be detected