Ultrasonic flow meter is known as one of the most commonly used instruments for measuring flow rates in various industries. This non-invasive technology has revolutionized flow measurement, offering high accuracy and reliability. In English, the ultrasonic flow meter is referred to as an "Ultrasonic Flow Meter".

The ultrasonic flow meter operates on the principle of utilizing sound waves to measure flow rates. The instrument consists of a pair of transducers that are mounted externally on the pipe through which the fluid flows. These transducers emit ultrasonic signals, which travel through the fluid and are then received by the other transducer. By measuring the time it takes for the signals to travel upstream and downstream, the velocity of the fluid can be determined.

The English name "Ultrasonic Flow Meter" accurately describes the functionality of this instrument. The term "ultrasonic" refers to the utilization of high-frequency sound waves (beyond the range of human hearing). The word "flow" signifies the measurement of fluid movement, and "meter" indicates the instrument's function of measuring quantities.

Ultrasonic flow meters have gained popularity due to their advantages over traditional flow measurement techniques. Firstly, they do not require the installation of additional parts inside the pipe, making them non-intrusive and easily installed. Moreover, these meters are capable of measuring flow rates in both directions, enabling bidirectional flow measurement.

Furthermore, ultrasonic flow meters are highly accurate, with the capability of providing precise measurements even for viscous fluids. They also have a wide measuring range, allowing them to be used in a variety of applications across different industries such as oil and gas, water treatment, chemicals, and more.

In conclusion, the English name for the ultrasonic flow meter is the "Ultrasonic Flow Meter". This instrument has become a vital tool for measuring flow rates in various industries, offering non-intrusive installation, high accuracy, and a wide measuring range. The ultrasonic flow meter has undoubtedly revolutionized flow measurement, providing engineers and technicians with reliable data for process optimization and efficiency improvement.