The HUALIU HL-UHF series ultrasonic flowmeter is a widely applicable, general-purpose and economical clamp-on transit-time ultrasonic flowmeter. Installation is extremely simple: no pipe breaking and no water shut-off are required to achieve flexible pipeline flow measurement. Optional permanent mounting fixtures require no routine maintenance and deliver reliable, drift-free measurement results over the long term. The instrument employs advanced digital correlation technology and intelligent adaptive acoustic technology for outstanding measurement stability, and applies patented acoustic focusing technology to significantly enhance the signal reception quality during continuous measurement.

Its measuring principle is based on the transit-time method: as the ultrasonic beam propagates through the liquid, the flow of the liquid produces a slight change in propagation time that is proportional to the liquid velocity. At zero flow, the propagation times in the downstream and upstream directions are identical; once the liquid flows, the upstream propagation time becomes greater than the downstream time, and the flow velocity and flow rate can be accurately derived by measuring this time difference. Clamp-on measurement is a non-contact method with no moving mechanical parts, unaffected by system pressure or harsh environments, achieving zero pressure loss.

The product can be flexibly configured with clamp-on small/medium/large transducers, insertion transducers, and inline connections according to pipe diameter and operating conditions, covering nominal diameters from DN15 to DN6000. It is widely used for the metering of water, pure water, seawater, sewage, chemical liquids, river water, fuel oil and other fluids, and can be used for energy consumption metering in refrigeration, heating, heat exchanger and boiler systems.