Test items for dissolved gas analysis in transformer oil

HZGC-1212A Oil DGA Analyzer can test 7 gases or 9 gases.
For 7 kinds gases tester,tests H2,CO,CO2,CH4,C2H4,C2H6,C2H2.Gas source is N2.
For 9 kinds gases tester,tests H2,O2,N2,CO,CO2,CH4,C2H4,C2H6,C2H2,Gas source is Argon