Are there sampling points installed on the exhaust stack?
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Do all exhaust stacks in a factory need to have analysis sampling points? Ammonia nitrogen and sulfur dioxide must definitely be monitored, but is it necessary to monitor exhaust stacks containing trace amounts of flammable gases? Should this be determined based on the type of gas or its concentration? Are there any mandatory requirements in the regulations?
Environmental protection requirements need to be established. Environmental monitoring is required during the environmental compliance inspection, and testing ports must be provided.
See what industry you’re in, and look up the **emission standards and regulations** for that industry; these are usually available, and the data should be transmitted directly to the environmental protection bureaus of the respective provinces and cities
Where should it be placed? Is it the fan outlet or the exhaust stack outlet? Generally, exhaust stacks are 20 meters tall