P860 series online zirconia oxygen gas analyzer is the online intelligent measurement instrument, which adopting advanced ion current oxygen sensor with single chip technology. N2%=100%-O2%. It has been widely used in the fields of nitrogen separation from air, fertilizer, petrochemicals and biological fermentation. P860 series online zirconia oxygen gas analyzer can analyze the nitrogen purity from 79%~99.9% , and also can test the oxygen from 21.0%~1000ppm.