Hydrogen has been a crucial industrial feedstock for various sectors but has traditionally been associated with high carbon dioxide emissions during production. As the world shifts towards cleaner energy solutions, the demand for clean hydrogen is on the rise. Analysts predict that global demand for clean hydrogen will surpass 250 million tons annually by 2050, and this figure may reach nearly 400 million tons annually if countries meet their net-zero CO2 commitments. The current major applications of hydrogen include petroleum refining, ammonia manufacturing, chemical production, oil hydrogenation, and metallurgical processes. However, emerging markets such as power generation, industrial heating, transportation, power-to-X, and rocket fuel are expected to drive the future growth of hydrogen demand. The article also discusses various methods of hydrogen production. While steam-methane reforming is currently the predominant method, efforts are being made to diversify production through methods like water electrolysis, methane pyrolysis, and direct extraction from the Earth's crust. These methods, combined with technologies like carbon capture and storage, aim to produce hydrogen sustainably without CO2 emissions. The article emphasizes the importance of accurate and cost-effective hydrogen flow measurements to support the expanding range of hydrogen applications in different industries.