Review on JIAWANSHUN Oxygen Flow Meter 0.1-1.5LPM / ⚙️ Gas Flowmeter Copper Connector for Oxygen Gas Concentrator by David Ross

I attached this mass air flow meter to my car smoke machine to determine flow in a closed system. The smoke machine helps to find leaks in a closed system. The mass airflow sensor used with the smoke machine helped me diagnose a leak and also when there were no leaks in the system. No flow in a closed system means no leaks. The product worked great for my use. Good build and great price.