Motion Detector

Product image for Motion Detector
Product image for Motion Detector
Product in use image for Motion Detector
Product in use image for Motion Detector

The Motion Detector is used to measure position, velocity, and acceleration of moving objects.


The Motion Detector uses ultrasound to measure the position of carts, balls, people, and other objects.

  • Measure objects as close as 15 cm and as far away as 6 m.
  • Sensitivity switch reduces noise and produces higher quality data for studying dynamics carts on tracks.
  • Attaches easily to the Vernier Dynamics System.
  • Pivoting head allows for flexibility in the experiment setup.

You may also want to purchase the Motion Detector Clamp to attach the Motion Detector to a variety of objects such as table tops, ring stands, etc.



  • Range: 0.15 to 6 m
  • Resolution: 1 mm
Download the user manual for full specifications

Experiments and Lab Ideas

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

Lab Ideas and Innovative Uses

What’s Included

  • Vernier Motion Detector
  • Motion Detector to LabQuest/LabQuest Mini/LabPro/CBL Cable
  • User manual

Sensor Requirements

The Motion Detector requires a compatible interface and software to collect data. Interface and software sold separately. Getting started with probeware »

Compatible Interfaces

The Motion Detector is compatible with these interfaces:

Ordering Information

All prices are for U.S. educators.

NameOrder CodePriceQuantity
Motion DetectorMD-BTD$79
Optional Accessories
Digital Extension CableEXT-BTD$12
Motion Detector BracketMDB-VDS$11
Motion Detector ClampMD-CLAMP$7

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 »

Order Code MD-BTD
U.S. Educator Price $79

Sample Data

Ball bouncing
Ball bouncing
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