Proper flow meter installation is critical in industry and commerce for monitoring and controlling the rate or total amount of liquid or gas flow through a pipeline. Accurate flow meters are essential for production process control, energy efficiency management, and fault detection. Ensuring their accuracy through correct installation and maintenance guarantees that flow meters consistently provide accurate data over time, thereby optimizing operational efficiency and resource utilization.

The Importance of Properly Installed Flow Meter

  • Production process control
  • Energy efficiency management
  • Fault detection
  • Data accuracy
  • Equipment life extension
  • Safety and security
  • Regulatory compliance
  • Ease of maintenance

Preparation for flow meter installation

Selection of the appropriate type of flow meter

Electromagnetic flow meter:

Ultrasonic flow meters:

Turbine flow meters:

  • Superior performance at high flow rates.
  • Suitable for measurement of liquids and gases.
  • Typically used in applications requiring high response time and a wide flow range.

Evaluate flow meter installation locations

Straight pipe section requirements: Ensure that the selected installation location has sufficient straight pipe sections, meaning that a minimum length of straight pipe section is required before and after the meter. These straight sections help to stabilize the flow of fluid and reduce the effects of turbulence and eddy currents, thus improving measurement accuracy.

Pipe size and fluid flow characteristics: Confirm that the size of the selected pipe and fluid flow characteristics in line with the installation requirements of the flowmeter. Different types of flow meters have specific requirements for pipe size and flow rate, these requirements are usually detailed in the installation manual or technical specifications of the flow meter.

Prepare the tools and materials required for flow meter installation


Wrenches (stainless steel or aluminum)
Screwdrivers (flat and Phillips head in various sizes)
Manual and electric screwdrivers
Manual and electric drills (for fixing brackets and mounting accessories)
Measuring tools (e.g. protractor, tape measure)
Pressure gauges (for calibrating pipe pressure)

Materials and fittings:

Pipe sealants or sealing tapes
Bolts and nuts (for securing meters and brackets)
Mounting brackets or clamps
Fittings and adapters (to ensure proper piping connections)
Cable protection sleeves and terminals (if applicable to electrically connected flow meters)

Flow meter installation process

  • Shut down and prepare: Ensure that the system is shut down and the piping is drained in preparation for a safe installation.
  • Install the flowmeter: Install the flowmeter properly in the intended location according to the installation manual provided by the manufacturer. Each flow meter is usually labeled with a directional arrow for fluid flow. Before installation, always check the arrow indications on the meter and make sure they point in the same direction as the actual fluid flow. When installing a flowmeter, the arrow should usually point in the direction of fluid flow, which is important to ensure that the flowmeter can work properly and measure accurately.

Need to pay attention to: straight pipe requirements, to avoid pipeline bending and direct influence of the valve, the flowmeter’s safe access and maintenance, to avoid vibration and mechanical influences, to avoid temperature extremes and chemical corrosion.

  • Connection confirmation: Understand the correct connection method according to the flowmeter design and the installation manual provided by the manufacturer. This includes the correct type of pipe connection interface (e.g., flange, threaded, etc.), the use of seals (e.g., O-rings, gaskets, etc.), and the installation torque of the fastening bolts. Ensure that the connections are properly tightened using the appropriate tools (e.g., wrenches or wrench sockets) to avoid over-tightening or over-loosening, thus preventing air leakage or piping damage.
  • Electrical connection check: If the flow meter has an electrical connection (e.g. electromagnetic flow meter), wire it correctly according to the electrical drawings provided. Ensure that all cables and terminals are securely installed to avoid electrical problems or risk of short circuits.
  • Environmental conditions: Consider the environmental conditions of the installation location, e.g. whether waterproof, explosion-proof or dust-proof features are required. Select a flow meter that meets the requirements of the installation environment to ensure that it can operate safely and reliably under adverse conditions.
  • Fixing and commissioning: Ensure that the flowmeter is securely mounted on the bracket and carry out the necessary commissioning and calibration. Verify that the flowmeter reads and operates properly.

Flow meter post-installation precautions

System inspection and testing

Test the operation of the system and meter and check for leaks or other problems.
Ensure that all connections are tight and free of leaks.

Records and maintenance

Record important information such as flowmeter installation location, model number, and initial calibration settings.
Provide for periodic inspection and maintenance of the flowmeter to ensure long term stable operation.

Installation details for different types of flow meters

Electromagnetic flow meter

Installation details

  • Electromagnetic flow meter usually need to be installed on the horizontal pipeline, make sure that the pipe diameter meets the requirements, and there are enough straight pipe sections to ensure stable fluid flow.
  • Ensure that the flow meter’s directional arrow points to the direction of fluid flow.
  • Connect the power and signal wires correctly according to the electrical drawings provided.
  • Electromagnetic flow meters usually require a good ground connection to ensure the stability and safety of the electrical signal.


  • Electromagnetic flow meter is sensitive to ambient temperature, make sure the ambient temperature of the installation location is within the allowable range.

Ultrasonic flow meter

Installation details

  • Ultrasonic flow meters can be installed on different types of pipes, including metal, plastic and composite pipes. Ensure that the inner wall of the pipe is flat and clean to avoid air bubbles or impurities affecting the signal of the ultrasonic sensor.
  • Set the installation distance of the ultrasonic sensor according to the guidelines provided by the manufacturer to ensure that the sensor can work properly and obtain accurate flow rate measurements.
What is doppler flow meter
What is doppler flow meter


  • Ultrasonic flow meters are suitable for different types of liquids, but are not usually suitable for gas measurements.
  • Avoid installing the ultrasonic transducer in areas that may be flooded or are susceptible to external shock or damage.

Turbine flow meter

Installation details:

  • The turbine flowmeter needs to be installed on a horizontal pipe and ensure that there is an adequate straight section of pipe before and after the installation location.
  • Ensure that the directional arrow on the turbine flow meter points in the direction of fluid flow.
  • Install the turbine flow meter on the pipe using the correct bolts and fasteners to ensure a secure and tight seal.
  • Set the turbine flow meter sensor mounting distance according to the manufacturer’s recommendations to ensure that an accurate flow rate measurement is obtained.
Turbine flow meter correct installation diagram
Turbine flow meter correct installation diagram


  • Ensure that there are no solid particles or contaminants within the fluid, these may damage the turbine flow meter sensor or affect measurement accuracy.
  • The turbine flowmeter is sensitive to ambient temperature, ensure that the ambient temperature at the installation location is within the allowable range.


Correct installation of the flowmeter is essential, and key steps include selecting the proper mounting location, ensuring the flowmeter is oriented correctly, using the correct connections and sealing materials, solid mechanical installation, correct electrical connections, and necessary calibration and commissioning. These measures not only ensure the accuracy and reliability of measurements, but also improve the operational efficiency and life of the equipment, reducing operational risks and costs.

Apure comes out with flow meters and also offers water quality analyzers, level gauges, pressure and temperature measuring instruments. Please contact us for more information.