The article focuses on how green hydrogen, produced through electrolysis powered by renewable sources, is crucial for Europe's sustainability goals. Advanced in-situ gas analyzers like the MOD-1040 and MOD-1060 have revolutionized the monitoring of hydrogen production, ensuring safety and efficiency. It highlights the significance of optical technologies like laser spectroscopy in providing accurate real-time analysis in harsh industrial environments, eliminating the need for sample extraction. The article emphasizes key measurement points in hydrogen production, such as monitoring oxygen and hydrogen concentrations at critical stages, and discusses the advantages of in-situ gas analysis, including a wide measurement range, fast response time, and high accuracy. The deployment of these technologies accelerates Europe's decarbonization efforts and sets a new standard for global industrial process analysis, enabling operational efficiency, cost savings, and enhanced safety. Green hydrogen emerges as a pivotal player in the transition towards cleaner energy sources, with optical technologies playing a vital role in ensuring the reliability and sustainability of hydrogen production processes.