Doppler Flow Meter - Flowmeters Indonesia

The Doppler Flow Meter has been around for decades, simply because it is an instrument that is able to measure flow velocity without having to intrude into a body or a process. There are various applications where the doppler shift principle is applied in everyday life. Some examples are blood flow, open channel and measurements of liquid velocity in closed pipes.

Types of Doppler Flowmeter

EESIFLO 3000 SERIES Doppler Flow Meter

A Doppler flow meter is a specialized instrument used for accurately measuring the flow velocity of liquids or gases within pipes. This technology operates on the principle of the Doppler effect, which describes the change in frequency of waves (in this case, ultrasonic waves) reflected off moving objects. By emitting ultrasonic waves into the flowing fluid and analyzing the frequency shift of the waves reflected back, the Doppler flow meter can calculate the flow velocity.

Key features of Doppler flow meters include their suitability for permanent installation on pipes. They are designed to provide continuous and reliable flow measurements without the need for direct contact with the fluid, making them ideal for various industrial and commercial applications.

These flow meters typically come equipped with a local display that shows real-time flow rate information, allowing operators to monitor fluid flow on-site. Additionally, they offer a 4-20 mA output signal, which enables seamless integration with control systems and data acquisition devices. This output signal is standardized in industrial instrumentation, making it compatible with a wide range of monitoring and control equipment.

Doppler flow meters are available in different configurations to suit specific operational needs. They are commonly offered in models that support both 110 VAC and 220 VAC power supplies, ensuring compatibility with different electrical systems used in various regions and industries.

In industrial settings, Doppler flow meters are particularly useful for applications where the fluid contains particles or bubbles, as these provide the necessary reflective surfaces for the ultrasonic waves. Typical applications include monitoring flow rates in wastewater treatment plants, chemical processing facilities, cooling systems, and HVAC installations

EASZ 10-P Portable Doppler Flowmeter

The battery-operated handheld Doppler flowmeter utilizes the Doppler Shift Principle to accurately measure flow velocities of liquids containing small particles or air, making it highly versatile across various pipe sizes and applications. This portable device is particularly well-suited for environments where traditional mechanical flowmeters struggle, such as applications involving slurry pumps.

Operating on the Doppler effect, the flowmeter emits ultrasonic waves into the flowing fluid. These waves reflect off particles or bubbles in the liquid, with the frequency shift between emitted and received waves proportional to the flow velocity. This principle allows the flowmeter to calculate and display real-time flow rates directly on its built-in screen.

Designed for ease of use in the field, the handheld flowmeter offers portability and can be used for on-the-spot measurements without the need for complex installation or calibration. Its compact design and battery operation ensure flexibility, enabling operators to assess flow conditions quickly and efficiently in diverse industrial settings.

Key features include its robust construction suitable for harsh environments and its ability to handle challenging fluids such as slurries. The device is equipped with intuitive controls and a clear display interface, facilitating straightforward operation by field technicians and engineers alike.

Applications for the handheld Doppler flowmeter include monitoring slurry pump outputs, assessing flow rates in processes where air or small particles are present in liquids, and troubleshooting flow issues where traditional flow measurement technologies may be impractical or unreliable.