CL-1-6S type is currently using six path configurations which could carry out accuracy measurement of natural gas and has good adaptability to intermittent flow, full flow, whirlpool flow, pulsating flow and other unstable flow fields of gas. The measuring bores ranges from DN100~DN400 and the working pressure covers from 0.1MPa to 26MPa (higher working pressure could reach 42MPa) with 0.5 class accuracy. CL-1-6S is suitable for transfer metering of natural gas trade, especially for the first station of long distance pipeline,sub-transmission pressure gas station, gate station,etc and unconventional gas (methane gas, coal bed gas, shale gas) trade .