... metallic rotameter is one of variable-area flowmeter with simple structure,work reliable,wide application field,high ... 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 ... .KF800D 4-20mA11.KF800DX 4-20mA with LCD display