... .0,6.4MPa 3.Tem:-80~+300C Metal tube water/gas rotameter, variable area flow meter IntroductionLZ steel rotor pipeline flow ... has simple structure, wild using range, high accuracy and low cost. The flow meter is available in local visual reading, data ... and explosive-proof types. It is wildly used for liquid & gas measuring and control in national security, chemical, petroleum, pharmaceutical, and ...