Metal tube float flow meter which uses the power of the liquid so that the float in the vertical installation of the measuring tube to move up the flow, the displacement of the float proportional to the size of the flow through the magnetic transfer system, in a non-contact manner, the float displacement Passed to the indicator directly indicates the size of the flow.By installing a HART smart card with HART protocol in the indicator, users can use HART communication software to manage and adjust the HART instrument and monitor the process variables during operation through the PC.Flowmeter simple structure, easy maintenance, reliable, wide applicability, can be used to measure the liquid, gas and steam flow.