Vernier Software and Technology
Vernier Software & Technology

Rotary Motion Sensor

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The Vernier Rotary Motion Sensor is a bidirectional angle sensor designed to measure rotational or linear position, velocity and acceleration.


The Rotary Motion Sensor lets you monitor angular motion precisely and easily. It is direction sensitive. You can use it to collect angular displacement, angular velocity, and angular acceleration data. Typical experiments include measuring moments of inertia, torque, pendula, and Atwood’s machine experiments. Even though we call it a Rotary Motion Sensor, it can also be used to measure linear position to a fraction of a millimeter.

Sample Data



  • Resolution: 1° or 0.25°
  • Optical Encoder: Bidirectional, quadrature encoder
  • Maximum Speed: 30 rev/s at 1° resolution 7.5 rev/s at 0.25° resolution
  • 3-step Pulley: 10 mm, 29 mm and 48 mm groove diameter
View the Rotary Motion Sensor user manual

Experiments and Lab Ideas

Select a lab book to see a list of experiments and more information.

Lab Ideas and Innovative Uses

Repeatable Rope Twisting

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 Rotary Motion 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
Rotary Motion SensorRMV-BTD$169
Optional Accessories
Rotary Motion Motor KitMK-RMV$12
Rotational Motion Accessory KitAK-RMV$110


Related Products

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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