Flow Rate Sensor

Product image for Flow Rate Sensor
Product image for Flow Rate Sensor
Product in use image for Flow Rate Sensor

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.



  • Range: 0 to 4.0 m/s (0 to 13 ft/s)
  • Accuracy: ±1% of full-scale reading
  • Resolution: 0.0012 m/s
    (LabQuest 2, LabQuest, LabQuest Mini, Go!Link, LabPro)
  • 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

  •  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

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What’s Included

Sensor Requirements

The Flow Rate Sensor requires a compatible interface and software to collect data. Interface and software sold separately. Getting started with probeware »

Compatible Interfaces

The Flow Rate Sensor is compatible with these interfaces:

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 »

Order Code FLO-BTA
U.S. Educator Price $129

Sample Data

Collecting flow rate data with a LabQuest
Collecting flow rate data with a LabQuest
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