Vernier Software and Technology
Vernier Software & Technology

Flow Rate Sensor

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The Flow Rate Sensor measures the velocity of water in studying the discharge, flow patterns, and sediment transport of a stream or river.


The Flow Rate Sensor can be used for environmental or Earth science studies. Flow rate data can be used to calculate the discharge value for a stream or determine the sediment transport of a stream. The Flow Rate Sensor includes 3 riser rods, which enable the impeller to be placed at fixed depths, and is equipped with a 5 m cable so your data-collection equipment can stay on shore. The Flow Rate Sensor also separates into four sections for easy transport and convenient storage.

Sample Data



  • Range: 0 to 4.0 m/s (0 to 13 ft/s)
  • Accuracy: ±1% of full-scale reading
  • Typical Resolution: 0.0012 m/s
  • Response time:
    • 98% of full-scale reading in 5 seconds
    • 100% of full-scale in 15 seconds
  • Temperature range (can be placed in): 0 to 70°C
Download the user manual for full specifications

Experiments and Lab Ideas

  • Water Quality with Vernier book cover

    Water Quality with Vernier (1)

    Includes student instructions, teacher tips, safety information, and sample data.

    Go to Book Page

Lab Ideas and Innovative Uses

Water Quality Investigations in the Grand Canyon

Do you have an innovative use for Vernier technology? What about a favorite lab or demo? We love to hear what creative uses people have for our products. Please email them to

Compatibility Requirements

The Flow Rate Sensor may require a compatible interface and software. Choose a platform below to see compatible interface and software options.

What’s Included

Ordering Information

All prices are for U.S. educators.

NameOrder CodePriceQuantity
Flow Rate SensorFLO-BTA$129


Educational use only: Vernier products are designed for educational use. They are not appropriate for industrial, medical, or commercial applications. Product usage disclaimer »

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