Sewage and waste gas on-line monitoring instrument

The utility model discloses an online monitoring instrument for sewage and waste gas, which belongs to the technical field of gas monitoring and comprises a diffusion type gas monitor and a storage rack. A partition plate is arranged in the storage rack, a cavity in the storage rack is divided into an installation bin and a ventilation bin through the partition plate, the installation bin is located at the upper end of the partition plate, a plurality of ventilation holes are formed in the end face of the partition plate, and the diffusion type gas monitor is fixed to the partition plate through bolts. According to the sewage and waste gas online monitoring instrument, the mode that the storage rack is combined with the stepped insertion pipe and the arc-shaped pieces is designed, the storage rack and the diffusion type gas monitoring instrument are arranged in a crack of two pipelines on the high layer of a waste gas chamber, the stepped pipe rotating mode is adopted, and the arc-shaped pieces abut against t