KS C IEC 61779-3-2003(2023) Electrical devices for detecting and measuring combustible gases - Part 3 Performance requirements for Group I devices for detecting methane volume fraction
2003KS C IEC 61779-3:2003 Electrical apparatus for the detection and measurement of flammable gases- Part 3:Performance requirements for groupâ… apparatus indicating a volume fraction up to 100% methane in air