Yokogawa ultrasonic flow meters, such as the US300FM series, are advanced instruments designed for precise and reliable flow measurement in fully liquid-filled pipes. They utilize the transit-time differential principle, where ultrasonic signals are transmitted both with and against the flow. The difference in the transit times of these signals is directly proportional to the fluid's velocity, which is then converted into a flow rate . A key advantage of Yokogawa's design is its non-intrusive, clamp-on capability, which allows for installation without cutting the pipe or interrupting the process, making it ideal for temporary surveys or permanent monitoring of corrosive or abrasive fluids .

These flowmeters incorporate sophisticated signal processing and noise suppression technologies, which contribute to high accuracy and stable measurements, even in challenging conditions with some entrained bubbles or suspended solids . They are suitable for a wide range of pipe sizes and can handle fluid temperatures up to 200°C . Models like the US300FM often feature dual-channel inputs, enabling simultaneous measurement of two separate lines or a more accurate dual-path configuration on a single large pipe to minimize the effects of an asymmetric flow profile .

The benefits of using a Yokogawa ultrasonic flow meter include minimal long-term maintenance due to the lack of moving parts and no pressure loss, leading to energy savings . Their flexibility, accuracy, and ease of installation make them a preferred choice for flow measurement applications in industries such as water and wastewater, petroleum, chemicals, and power generation .

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