The utility model provides a poisonous
gas detector with a filtering structure, which belongs to the technical field of detectors and comprises a shell, a control mainboard and a detection module electrically connected with the control mainboard are arranged in the shell, an air inlet is arranged at one end of the shell, a filtering component, a delivery pump and a detection probe are arranged on one side of the air inlet, and the detection probe is arranged on the other side of the air inlet. The filtering
assembly comprises two groups of filtering columns connected in parallel, an outlet of the filtering
assembly is connected with an inlet of the conveying pump, an inlet of the filtering
assembly is connected with an air inlet pipeline through the switching assembly, an outlet of the conveying pump is connected with the detection probe, and the detection probe is electrically connected with the detection module. According to the device, two groups of filtering columns which are connected in parallel and a switching assembly are arranged, so that a user can select a proper filtering column to filter gas according to components of
toxic gas in different detection environments; and the adaptability of the device is improved.