... flow meter,variable-area metallic rotameter 2>kinds:needle indication,4-20mA output,LCD display 3>horizontal,vertical instal product description of flow ... temperature proof,safety,ocular reading etc,it is suitable for chemical industry,petroleum,metallurgy,power plant,environmental protection, ... mm)Measure RangePressure Loss(Kpa) Water(L/h)Air(Nm3/h)Orifice PlateCone Pipe Normal TypeCorrosion-proof type ...