Visual explosion-proof cover of gas detector

The invention discloses a visual explosion-proof cover of a gas detector. The visual explosion-proof cover comprises a calibration cover, a lower cover, a stainless steel net threaded ring, an upper cover, a glass window, a gland, a threaded plug, a nut and the like, wherein the interior of the calibration cover is connected with the lower cover; the bottom of the inner side of the lower cover is connected with the stainless steel net threaded ring; the top end of the lower cover is connected with the bottom end of the upper cover; the glass window is arranged on the side face of the upper cover; the gland is arranged on the outer side of the glass window; the threaded plug and the nut are arranged at the top end of the upper cover. According to the cover, the glass window is arranged on one side of the upper cover to realize a good visual effect, and can effectively help to detect the situation in a product. An encapsulation explosion-proof joint face is added between the glass window and the upper cover, thereby effectively improving an explosion-proof effect. All parts in the cover are sealed well, so that the detection accuracy of the detector is effectively improved.