Wireless Motion Sensor (NS)

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Product Code: 136



The Wireless Motion Sensor connects via Bluetooth or USB to your device and uses ultrasound to measure the position, velocity, and acceleration of objects. This enables students to take turns measuring themselves, while the class observes their motion materializing as a graph in real-time. The sensor can detect objects ranging from 15 cm to 4.0 m away, and without cables to get in the way, students can explore 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

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 50 Hz
Transducer rotation range 180°
Rechargeable battery Lithium-polymer
Connectivity Direct USB or via Bluetooth (Bluetooth 4.0)

Battery and 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.

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.

Near and Far

In this lab, students use a motion sensor to describe the position of an object as being near or far from another object. This lab will help students recognize that an object in motion changes its position.

Acceleration and Gravity

In this activity, students will use motion sensors to analyze how gravity affects the motion of falling objects varying in size and mass.

Newton’s Second Law

In this lab, students will use force and motion sensors to study the relationship between the net force applied to an object, the acceleration of the object, and the object’s mass.

Relative Motion

In this lab, students will use motion sensors to apply the concepts of relative motion and frames of reference to understanding velocity as a vector quantity in one-dimensional motion.

Position: Match Graph

Use a motion sensor to introduce the concept of representing motion as a change of position in a graphical form.

Work and Energy

In this lab, students will use motion and force sensors to develop an understanding of the work-energy theorem that relates the work done on an object by a net force to the change in the object’s kinetic energy.

Supporting Documents

Wireless Motion Sensor Manual English 1.19 MB