GC-9780b Sulfur hexafluoride equipment discharge decomposition products portable helium ion detector using helium ionization gas chromatography principle,It can analyze 17 decomposition products of sulfur hexafluoride gas such as H2, O2, N2, CH4, CF4, CO, CO2, NF3, N2O, C2F6, C3F8, SO2F2, SOF2, SO2, H2S, COS, CS2, and carry out real-time monitoring of H20.To provide data support for judging whether there are latent faults such as spark discharge, arc discharge, gap breakdown, corona and surface discharge in GIS and ensure the safe operation of power grid.