Nitrogen purging is essential to the care and maintenance of night vision devices. ASU's compact purge kits are portable and ruggedized for field or lab environments. South-Tek's proven nitrogen generation products have enabled night vision device maintenance and repair in any environment.  Since 2006 South-Tek Systems has been supplying the US Military with reliable Nitrogen generation solutions engineered to deliver high-purity Nitrogen with design features that specifically address the military’s needs for expeditionary and stationary systems.