... description of variable area flowmetersKF800 series metallic rotameter is one of variable-area flowmeter with simple structure,work reliable, ... it is suitable for compatible liquids,gases.KF800DX series metallic rotameter with LCD and 4-20mA electricity signal output,restrict ... alarm and many kinds of signal,compared with other flowmeters,this series has the characteristics of high-pressureproof,high- ...