Flow measurement is a critical aspect of various industrial processes, ensuring accuracy, efficiency, and safety. Among the essential tools in this field are flow meters and related instruments, each tailored to specific applications. For CO2 welding machines, gas flow meters play a vital role in controlling and monitoring gas consumption. Water flow meters are widely used to measure the flow rate of water in various systems, while diesel, petrol, and oil flow meters are crucial for the accurate measurement of fuel in transportation and industrial settings. Air velocity meters and anemometers are indispensable for measuring airflow and wind speed, respectively, in HVAC systems and environmental monitoring. Additionally, rotameters offer a simple yet effective solution for visualizing flow rates, and flow/level transmitters, such as differential pressure transmitters (DPT), provide precise monitoring of fluid levels and flow in tanks and pipelines. These instruments collectively contribute to the smooth operation and optimization of processes across industries.