Ultrasonic flow meters are inferential meters that use ultrasonic technology to measure the velocity of an acoustically conductive liquid moving through it. There are two types of ultrasonic flow meter technologies, including Doppler and transit time. In addition to inline and open channel models, ultrasonic meters are available as clamp-on solutions when contact with the measured fluid is not possible.
1.Features
Ultrasonic flow meters are a popular solution to simplify flow measurement across a variety of applications.
- Impressive Accuracy. Maintain accuracy across a wide range of applications with a greater extended low flow accuracy compared to mechanical meters.
- Flexible Installation. Can be installed permanently or temporarily—clamp-on meters can be installed by a single user within an hour as a temporary measurement solution or to verify the accuracy of other meters.
- Minimal Maintenance. Feature a streamlined design without moving parts, which results in minimal maintenance and low cost of installation and ownership.
2.Measuring Principle
Ultrasonic meters measure the velocity of a fluid flowing through a pipe in one of two ways: transit time or Doppler technology. Transit time technology measures the time differential between signals sent upstream and downstream. The differential is directly proportional to the velocity of the water. Doppler technology measures the difference in sound wave frequency reflected off gas bubbles or particles in the flow stream.
3.How It Measures
With this technology, ultrasonic waves transmit upstream and downstream through the pipe wall and liquid flowing in the pipe. By measuring the difference in the travel time and knowing the pipe size, the meter determines the velocity and flow rate. Transit time ultrasonic flow meters use two transducers, which mount to the outside of the pipe and function as both ultrasonic transmitters and receivers. The flow meters operate by alternately transmitting and receiving a frequency-modulated burst of sound energy between the two transducers.
4.Key Applications
- HVAC/Energy Monitoring
- Water Treatment
- Water Delivery Gray or Black Water
- Produced Water
- Power Generation
- Food and Beverage Processing
