In February 2025, Sensirion, based in Stäfa, Switzerland, through its division Qmicro, announced the achievement of OIML R140/MID accuracy class A certification for their DynamiQ-X GC analyzers. These gas analyzers, designed for the analysis of natural gas and natural gas blended with hydrogen, underwent rigorous testing by NMi in the Netherlands. The certification, with the number TC12537, simplifies the approval process for system integrators involved in composition control and custody transfer operations. The certification process involved assessing metrological characteristics over a wide temperature range, performance under dynamic environmental conditions, and the functionality of software and firmware. The OIML R140/MID approval not only streamlines the approval process across member states but also provides benefits such as reduced risks, time savings, and cost efficiency for system integrators. The DynamiQ-X GC analyzers covered under this certification include the NG2210 and NG2220 versions. The NG2210 offers analysis for natural gas C6+ composition and calorific value calculations, while the NG2220 specializes in analyzing natural gas blended with hydrogen at concentrations of up to 20%. These compact Ex-certified process gas chromatographs aid in precise composition control and custody transfer. Qmicro, a division of Sensirion since 2021, focuses on developing high-tech products for on-line gas composition analysis using micro-GC chip technology. The 'DynamiQ' micro-GC gas analyzer product line serves industrial process control and automation applications. Sensirion, a global leader in sensor solutions, aims to enhance efficiency, health, safety, and comfort through its sensor technologies across various sectors including automotive, industrial, medical, and consumer electronics.