What is a Portable Ultrasonic Flow Meter

A portable ultrasonic flow meter is an advanced flow measurement device widely used in industries such as manufacturing, environmental protection, water conservation, and power generation due to its portability and high accuracy. This article provides a detailed introduction to its working principle, main features, application fields, operation methods, and maintenance, helping users to better understand and utilize this device.

What is a Portable Ultrasonic Flow Meter

Working Principle

The working principle of a portable ultrasonic flow meter is based on the transit-time method. The flow meter uses two ultrasonic sensors (a transmitter and a receiver) that send and receive ultrasonic signals in both the direction of fluid flow and against it. Due to the fluid flow, the travel time of the ultrasonic waves is shorter in the direction of the flow and longer against the flow. By calculating the time difference between these two signals, the flow speed of the fluid is determined, which in turn is used to calculate the flow rate.

Main Features

  • Portability

Portable ultrasonic flow meters are small in size and light in weight. They are typically equipped with a carrying case or bag, making them easy to transport and operate on-site. They are suitable for situations requiring frequent movement of measurement locations.

  • Non-contact Measurement

Ultrasonic flow meters use a non-contact measurement method, which means there is no need to cut the pipe or stop the fluid flow. They are suitable for various pipe materials and diameters.

  • High Accuracy

Ultrasonic flow meters offer high accuracy and repeatability, typically achieving an accuracy within ±1%, making them particularly suitable for applications requiring precise measurements.

  • Multi-functionality

Portable ultrasonic flow meters can measure not only flow rate but also flow velocity, cumulative flow, and other parameters. They often come with data recording and storage functions, facilitating data analysis and processing.

  • Wide Range of Applications

These meters are suitable for measuring various fluids such as water, seawater, sewage, and chemical liquids, and are widely used in different industrial fields.

  • Easy Installation

Portable ultrasonic flow meters are easy to install. Simply attach the sensors to the exterior of the pipe, usually with magnetic fixtures, and no professional installation tools are needed.

Application Fields

Portable ultrasonic flow meters are widely used in the following fields:

  • Industrial Production

Used in industries such as chemicals, petroleum, pharmaceuticals, and food and beverages to monitor and control fluid flow during the production process, ensuring process stability and product quality.

  • Environmental Monitoring

They are used in wastewater treatment plants and at wastewater discharge points to monitor discharge flow in real-time, ensuring compliance with environmental standards and protecting the environment.

  • Water Conservation Projects

Used in reservoirs, dams, and irrigation systems to monitor and manage water flow, improving the efficiency of water resource utilization.

  • Energy Sector

Used in electricity, thermal energy, and natural gas industries to measure and monitor the flow of energy media, optimizing energy management and promoting energy conservation and emission reduction.

  • Scientific Research

They are used in research institutes and university laboratories for fluid mechanics and hydraulics experiments, providing accurate flow data.

By understanding and properly using portable ultrasonic flow meters, users can achieve precise flow measurements and better control over various processes. It contributes to technological advancements and improved management across different industries.

JC-3000P Portable Ultrasonic Flowmeter 2

Operating Methods

Operating a portable ultrasonic flow meter typically involves the following steps:

  • Preparation

Check the instrument and accessories for integrity. Ensure the battery is fully charged and use a power adapter if necessary.

  • Selecting Measurement Point

Choose an appropriate measurement point. Ensure the pipe surface is smooth and clean, with no significant rust or dirt. There should be sufficient straight pipe segments before (10 times the pipe diameter) and after (5 times the pipe diameter) the measurement point.

  • Installing Sensors

Choose the appropriate sensor type and installation method (V method, Z method, or N method) based on the pipe material and diameter. Fix the sensors on the pipe’s outer wall, adjust the sensor spacing, and connect the signal cables.

  • Entering Parameters

Enter pipe parameters (e.g., diameter, material, wall thickness) and fluid parameters (e.g., type of medium, temperature) into the flow meter.

  • Starting Measurement

Turn on the flow meter, perform signal debugging to ensure signal strength and signal-to-noise ratio meet requirements, and then start real-time flow measurement.

  • Data Recording

Record and store data as needed. Portable flow meters usually come with built-in storage or external memory cards to log measurement data for extended periods.


To ensure long-term stable operation and measurement accuracy of the portable ultrasonic flow meter, regular maintenance is crucial:

  • Regular Calibration

Calibrate the flow meter regularly to ensure measurement accuracy and recommend annual professional calibration.

  • Cleaning Sensors

Clean the sensor surfaces regularly to avoid dirt and rust that could affect ultrasonic signal transmission.

  • Checking Battery

Regularly check the battery level, replace the battery or use a power adapter in time to avoid measurement interruptions due to insufficient power.

  • Storage Environment

Properly store the flow meter after use. Avoid storing it in high-temperature, high-humidity, or strong magnetic field environments to prevent damage.

  • Protective Measures

Take protective measures when using the device in harsh environments, such as waterproofing, dustproofing, and shockproofing, to ensure the instrument’s safety.


As an advanced flow measurement tool, the portable ultrasonic flow meter features portability, non-contact measurement, high accuracy, and multifunctionality. It is widely used in various industrial and research fields. Proper operation and regular maintenance are essential to ensure the instrument’s measurement accuracy and service life. Through reasonable application and management, the portable ultrasonic flow meter will provide strong support for flow measurement and control, promoting technological advancement and management level improvement in various industries.

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