Double-waist-wheel gas Roots flow meter

The utility model relates to a double-waist-wheel gas Roots flow meter, which comprises a casing, a display assembly, a front pressure cover and a rear pressure cover. The front pressure cover and the rear pressure cover are respectively installed at two ends of the casing, the display assembly is fixedly connected onto the front pressure cover or the rear pressure cover, two measuring cavities are arranged in the casing, a group of waist wheels is respectively arranged in the two measuring cavities, and the two groups of waist wheels are arranged in staggered mode. Waist wheel shafts are arranged at two ends of the two groups of waist wheels, a bearing is arranged on each waist wheel shaft respectively, each waist wheel shaft and each bearing are in transition fit, and all bearings are fixedly installed on the casing. The technical scheme is that the double-waist-wheel gas Roots flow meter has the advantages of being reliable in work, small in pulsating flow interference and accurate measurement and long in service life.