High-precision and wide-range integrated differential pressure type flow measurement device

The invention provides a high-precision and wide-range integrated differential pressure type flow measurement device. The device comprises an integrated throttling device, a pressure detection device,a temperature detection device, a high-range flow measurement device, a low-range flow measurement device and a flow totalizer. The integrated throttling device comprises a throttling device, a pressure guiding device and a pipeline main body in integrated molding design; the flow totalizer communicates and connects with each of the pressure detection device, the temperature detection device, thehigh-range measurement device and the low-range flow measurement device; the flow totalizer can automatically switch a flow value measured by the high-range flow measurement device and the flow valuemeasured by the low-range flow measurement device according to the actually measured flow value, and can perform compensation computation on the switched value and display the same. The device provided by the invention has the