CL-2-2-JK type is specialized designed for metering of well head gas with two path configurations which could carry out accuracy measurement of natural gas (wet gas at well head) 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 DN50~DN500 and the working pressure covers from 0.1MPa to 26MPa (higher working pressure could reach 42MPa) with 1.0 class accuracy,which is suitable for Internal reference measurement of various oil and gas fields and natural gas.