Nitrogen - Zero Air Combination Gas Generator (without Air Compressor) - Model: NZA-2300 is excellent for gas chromatography. Unlike typical gas sources, this sort of generator has a consistent and reduced baseline signal, ensuring ultra-high purity grade zero air for combustion gas. The zero-air generator is simple to use and requires no labor-intensive monitoring. Nitrogen - Zero Air Combination Gas Generator (without Air Compressor) - Model: NZA-2300 exists in a variety of forms and sizes, but they always rely on compressed air to function.