How is an exhaust gas sampling device made? Are there any images for reference?

A mouth of about 20mm. There is a sampling device that contains a pump to insert a tube into the gas duct in order to draw out air; the air passes through an absorbent for a certain period of time, after which the absorbent is tested

The design of the exhaust gas sampling device is related to the size of the inlet, and it needs to be determined based on actual requirements and the properties of the exhaust gas. Generally, the design of an exhaust gas sampling device involves the following basic steps: 1. Determine the sampling location: Identify an appropriate location for sampling based on the specific conditions of the exhaust gas emission source. 2. Design the suction pipeline: Use the suction pipeline to introduce exhaust gas into the sampling device. The intake duct can be a single straight pipe, or a system composed of multiple branch ducts. 3. Install a filtering device: To prevent impurities from entering the sampling device, it is necessary to install a filtering device in the suction pipeline, such as a filter screen or filter. 4. Design the sampling chamber or container: The sampling chamber or container is the place where exhaust gas is collected. Control devices for temperature, pressure, and humidity can be installed in the sampling chamber to maintain the properties of the exhaust gas unchanged. 5. Install sampling devices and sensors: Install appropriate sampling devices and sensors as needed to monitor the composition, temperature, humidity, etc. of the exhaust gases. As for the size of the opening, this needs to be determined based on the actual circumstances. Generally, the size of the sampling port should be large enough to ensure that exhaust gas can flow smoothly into the sampling device without creating significant resistance to gas flow. However, the specific diameter size must be calculated and designed based on the flow rate and characteristics of the exhaust gas. Regarding specific drawing references, since the design schemes for each exhaust gas sampling device vary, it is not possible to provide specific drawing references. It is recommended that you consult professional engineers or relevant technical personnel during the design process to obtain more accurate and reliable advice and design solutions. .