What Is a Doppler or Ultrasonic Flow Meter?

An ultrasonic flow meter is a type of flow sensor that measures the velocity of fluids. Using ultrasonic transducers, the flow meter can measure the average velocity along the path of ultrasonic beams emitted, based on the average time difference measured between the transmitted ultrasonic pulses in the flow direction or by measuring the frequency shift. Ultrasonic flow meters have three models based on the measurement method:

• Transit-Time Flow Meter

• Doppler Flow Meter

• Open-Channel Flow Meter

Technical Specifications of Ultrasonic Flow Meter

One of the types of flow meters, ultrasonic flow meters, are influenced by the acoustic properties of the liquid and can be affected by temperature, density, viscosity, and suspended particles, depending on the flow rate. Ultrasonic flow meters differ significantly in purchase price, but their use and maintenance are often inexpensive because, unlike mechanical flow meters, they do not use moving parts. Ultrasonic flow meters have digital outputs.

Types of ultrasonic flow meters based on pipe installation:

• Clamp-On Ultrasonic Flow Meter

• In-Line Ultrasonic Flow Meter