... N2 of purity 95%~99.9% from the air to use for foodstuff fresh-keeping packing.At the same ... displayed online on numeric meter.2,Furnish four-grade filters and drier to remove water,oil and impurity of compressed ... air to ensure N2 generator running smoothly and steady ... 4,Reasonable N2 purity,can be adjusted from 95% to 99.5%.5,Compact in frame, light in weight, ...