Steam quality flowmeter and its measurement method

The invention relates to metrical instrument field, specifically to a steam quality flow meter and a measuring method thereof. The steam quality flow meter widely used abroad can only be used for measuring the mass of high temperature high pressure gas. However, for superheated steam, wet saturated steam, saturated steam, water, oil and other fluids, particularly for high temperature high pressure fluid with relatively small caliber size, the measurement accuracy is low and the energy loss is high. The invention comprises an outer pipe, a power supply, a differential pressure transmitter, an intelligent indicating meter and a condenser, wherein a high-precision primary element is disposed inside the outer pipe and is a blind pipe with one end closed, and pores capable of obtaining internal and external pressure difference is provided on the surface of the blind pipe. The invention has the advantages of wide application range, low pressure loss, high precision, high reliability, wide measuring range, telecommu