This series of ultrasonic flowmeter HSF-3000 is an industrial time-difference type ultrasonic flowmeter. It applies the latest industrial-level PFGA 700-thousand-gate-array chip, which extremely improves the signal sampling frequency and bubble tolerance rate; the self-developed TGA technology makes it be capable of dealing with more complex logic and calculation to provide more accurate and faster measurements, and ensures the flowmeter could endure non-continuous bubbles or impurities within 5 sec. In addition, it could be installed and operated in a convenient way with no need to break the pipe or cut off the fluid or stop work.