Wireless Motion Sensor (Local Stock)

Product Code: PS-3219-LS


The Wireless Motion Sensor uses ultrasound to measure the position, velocity, and acceleration of objects, ranging from 15 cm to 4.0 m away. With both Bluetooth and USB connectivity, this easy-to-use sensor enables students to take turns measuring their distance, while the class observes their motion materializing as a graph in real time. And, without cables to get in the way, students can extend their studies with handheld and ceiling-mounted applications!


  • Measures position, velocity, and acceleration
  • False Target Rejection Technology produces cleaner data
  • Clips directly to PASCO Dynamics Tracks
  • Rod clamp for mounting
  • 180° pivoting head
  • Rechargeable lithium-ion battery
  • Bluetooth® or USB connectivity


  • Measure the motion of moving objects
  • Explore the relationship between position, velocity, and acceleration
  • Measure objects in freefall
  • Measure how air resistance affects falling objects
  • Investigate frames of reference
  • Investigate the Conservation of Energy and Momentum
  • Simple harmonic motion
  • Seafloor mapping

What’s Included

Experiment Library

Perform the following experiments and more with the Wireless Motion Sensor.
Visit PASCO’s Experiment Library to view all activities for this product.

How It Works

The Wireless Motion Sensor uses echolocation, similar to a dolphin or bat. In order to determine the distance to an object, an ultrasonic pulse is emitted from the sensor. The sensor listens for a signature ‘echo’ which reflects off the object’s surface. The object’s distance is calculated by determining the elapsed time between the ultrasonic pulse and detected echo, then, this value is used with the speed of sound to calculate the object’s distance. Measurements of velocity and acceleration are derived algorithmically using numerical methods. This provides a balanced approach to calculating numerical derivatives, which reduces noise and minimizes smoothing effects on high-frequency peaks.

The Wireless Motion Sensor is also ideal for use with our free MatchGraph! software, an ideal way to teach the concepts of motion, motion graphing and rate of change or slope.

Product Specifications

Range 0.15 to 4 m
Resolution 1 mm
Maximum sample rate 250 Hz
Transducer rotation range 180°
Rechargeable battery Lithium-polymer
Connectivity Direct USB or via Bluetooth (Bluetooth 4.0)

Battery & Logging

Stored Data Points Memory (Logging) 1 Not Supported
Battery – Connected (Data Collection Mode) 2 >20 hr
Battery – Logging (Data Logging Mode) 3 Not Supported
Battery Type LiPo

1 Minimum # of data points with all measurements enabled, actual results depend on enabled measurements.

2 Continuous use in a connected state until battery failure, actual results will depend on sample rate, active measurements, and battery condition.

3 Logging until battery failure, actual results will depend on sample rate, active measurements, and battery condition.

* Normal classroom use is the sensor in active use for 20min/lab for 120 lab periods/yr.