Frequently Asked Questions

Find solutions here on common queries on our flow meters

Before reaching out with your question, take a moment to explore the topics below.  You might find the answer you are looking for right here. If not, feel free to contact us for personalized assistance.

Additionally, all relevant resources, including data sheets, manuals, and product information, can be downloaded from our document center.

Working Principle

How do flow meters work?

Our turbine flow meters utilize infrared reflections to measure flow. For a more detailed explanation, watch the video below:

How accurate are the measurements?

Achieving accuracies of 1%, our devices provide reliable measurements.

What is the K-factor?

Each flow tube comes with its own K-factor (calibration factor). The K-factor represents the number of pulses per liter of liquid passing through the flow meter. You can find the factory-calibrated K-factor listed on the label attached to each flow tube. Typical K-factor values are available on the respective product pages.

Measured Medium

What can the flow meter measure?

The flow meters are designed to measure low viscosity liquids. On the respective product pages, you can find the recommended flow range, temperatures, and pressures. If you need personal assistance to ensure compatibility with your specific process conditions, feel free to contact our engineers.

Can the turbine flow meters of Saint-Gobain measure gasses?

Our flow meters are tested with liquids, when using gasses, we therefore cannot make any claims with respect to accuracy and longevity.

Can Saint-Gobain turbine flow meters measure chemicals and/or corrosive liquids?

Absolutely! Thanks to the use of fluoropolymers (PVDF and PFA) the flow meters have excellent chemical resistance. They are well-suited for handling corrosive liquids.

Can opaque and/or colored liquids be measured by Saint-Gobain turbine flow meters?

The reflection measurement principle employed by our flow meters allows accurate measurement of both opaque and colored liquids. In cases where a white opaque liquid is used, we can provide a flow meter with a black turbine for optimal performance.

Can liquids with particles cause issues in use with Saint-Gobain turbine flow meters?

To ensure trouble-free operation, we recommend using an in-line filter before the flow meter. The recommended pore sizes range from 100 to 250 microns, depending on the flow meter model that is used. Particles that can pass through these pores pose no problem for our flow meters.


What material is the flow meter and its wetted parts made of?

For details on the materials used in our flow meters and their wetted parts (those in direct contact with the liquid), please refer to the respective product pages.

What process connection does the flow meter have?

The available process connectors for each flow meter are listed on the product pages.


Can I use the flow meter for monitoring the flow?

Yes, you can. We offer two products that seamlessly integrate with our flow meter for flow monitoring:

  1. Flow Display
    • A compact display that shows the current flow rate.
  2. Flow Controller 
    • Monitors the flow rate and displays the totalized volume
    • Additionally, we have a dual flow version available, allowing connection to two flow meters.
Can I use the flow meter for dosing / batching?

Yes, you can. Our Batch Controller is designed for batch control applications. It utilizes relays to e.g., open or close valves based on the dosed volume.

My application requires a product modification, is this possible?

Yes, we offer custom-made and OEM solutions tailored to your specific requirements. Reach out to our engineering team for one-on-one support and to discuss your application.


Are the flow meters calibrated?

Yes, each flow meter is factory calibrated. Our calibration process involves continuous water flow to ensure accurate measurements.

Do I have to calibrate the flow meter in my process?

We recommend performing a calibration if your experimental conditions differ from our test conditions. For instance, if you use pulsating flow, we recommend performing a calibration. Typically, the deviation from our calibration remains constant, so you only need to determine it once.

Can I receive (calibration) certificates of the flow meter?

Absolutely! We can provide a Certificate of Conformity for all our products. Additionally, each flow meter can be provided with a Calibration Certificate, available for either 1 or 5 calibration point(s). You can download examples of these certificates. 

If you require certificate(s) after receiving your order, please reach out to our sales team for further assistance.

Single Use Flow Meters

How are the flow tubes exchanged?
  • This video shows how to use the Tubeholder: 
  • This video shows how to use the Clamp System: 
  • This video shows how to use the Clip Mounting: 


Are the flow meters gamma stable?

Yes, our PVDF disposable flow tubes can withstand sterilization with a gamma radiation dose of up to 50 kGy.

Do I have to recalibrate each flow tube after exchange?

When using disposable flow tubes, you have three options:

  1. Manual Entry:
    • Manually input the K-factor of the new tube.
  2. Average K-Factor:
    • Use the average K-factor from the flow tubes you have ordered (if a slight decrease in accuracy is acceptable).
  3. Barcode Scanner :
    • Utilize our barcode scanner for seamless recalibration.

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