The AFP-7000 gas flow pattern tester is an economical and practical product. This product uses the principle of ultrasonic atomization to atomize pure water into a large amount of water mist of about 1-10 microns. Under the action of external pressure, it can be discharged through a smoke pipe and present a thick smoke mist. Testing the airflow organization status in multiple industries, especially in the clean room industry, is very intuitive.