When sourcing a Tire Nitrogen Machine, you must prioritize Nitrogen Purity, which should ideally reach 95% to 99.5% for optimal tire performance. Look for machines with a High-Efficiency Carbon Molecular Sieve (CMS), as this is the core component responsible for oxygen separation. Additionally, verify the Output Pressure (typically 6-10 bar) and Tank Capacity (50L to 100L) to ensure the unit can handle the volume of your specific service environment, whether it is a small workshop or a high-traffic fleet center.