The noise method ultrasonic flowmeter is a technology that calculates flow by detecting and analyzing the broadband ultrasonic noise (or "hydrodynamic noise") generated by the fluid itself during flow.

1. Purely non-intrusive and extremely easy to install: The sensor is simply clamped or attached to the outer wall of the pipe, without any drilling or interruption of flow, making it a truly non-destructive installation.
2. No pressure loss and no moving parts.
3. Low cost potential: The hardware structure is simple (sensor + processor), making it suitable for temporary measurement or large-scale deployment for screening.
4. Applicable to extreme pipes: It is suitable for lined pipes, cement pipes, non-metallic pipes, and other pipes that are difficult to drill and install.
5. Can provide additional diagnostic information: Changes in noise spectrum can simultaneously reflect the status of pumps and valves, cavitation occurrence, initial leakage, and other equipment health information.

1. Pipeline leakage census and regional leakage monitoring (DMA): Temporarily installed at multiple key nodes of the water supply pipeline network, it detects leakage by monitoring abnormal minimum night flow (MNF). It is quick to install, low-cost, and suitable for large-scale screening.
2. Preliminary energy efficiency assessment of industrial equipment: Conducts a rapid census of flow distribution in dozens of circulating water pipelines within a factory to identify abnormal branches with significantly higher or lower flow rates, guiding further precise measurement and energy-saving renovations.
3. Process trend monitoring and alarm: Monitors whether the pump's outlet flow shows a trend of interruption, severe decline, or abnormal increase, serving as a rough interlock protection or alarm.
4. Scientific research and fluid dynamics experiments: Studies the relationship between turbulence intensity, cavitation onset point, and noise spectrum.
5. Last resort for extreme pipeline conditions: FRP pipes, pipes with severely corroded linings, and pipes that cannot be shut down for installation of other flowmeters.

The noise method ultrasonic flowmeter is a "pragmatic scout" in the field of flow measurement, rather than a "main force". It sacrifices measurement accuracy and reliability in exchange for unparalleled installation convenience and extremely low installation costs.