Diffusion type air quality monitor

The utility model discloses a diffusion type air quality monitor, which comprises a mounting seat, the shell is fixedly connected with the mounting base; the sensor mounting frame is arranged in the shell; wherein the shell comprises an upper shell, a middle shell and a lower shell which are fixedly connected in sequence, the upper shell is fixedly connected with the mounting base, the sensor mounting frame is fixed inside the middle shell, an air inlet hole is formed in the lower surface of the lower shell, and a gap allowing air to flow out is formed between the upper shell and the middle shell. 本实用新型公开了一种扩散式空气质量监测仪，它包括：安装座；壳体，所述壳体与安装座固定连接；以及置于壳体内的传感器安装架；其中所述壳体包括依次固定连接的上壳体、中间壳体和下壳体，其中，上壳体与安装座固定连接，传感器安装架固定在中间壳体内部，下壳体的下表面上设置有进气孔，所述上壳体和中间壳体之间设置有供气体流出的缝隙。