Wireless Rotary Motion Sensor

SKU: PS-3220 Category: Tags: ,



Our Rotary Motion Sensor may be the most useful sensor in physics! Use it to study optics, dynamics, centripetal force, the motion of a pendulum and many other topics. Measures position, velocity and acceleration (angular and linear) with incredible (0.09 º) resolution and accuracy. A higher maximum spin rate (30 rev/sec) allows students to perform a full range of motion experiments.

  • Measures magnitude and direction of motion.
  • Ball bearings minimize friction and provide mechanical support to rotating objects.

Typical Applications

  • Verify conservation of angular momentum
  • Calculate rotational inertia of disk ring and point mass
  • Measure displacement velocity and acceleration of a cart on a track
  • Conduct quantitative analysis of simple harmonic motion
  • Measure acceleration of a cart caused by a mass hung over a pulley


  • Three-step pulley (10, 29 and 48 mm diameter)
  • Rod clamp for mounting in almost any orientation

Product Specifications

Angle resolution 0.18° (0.00314 radian)
Linear resolution 0.0157 mm (with 5 mm pulley radius)
Three-step pulley 10, 29, and 48 mm in diameter
Shaft diameter 6.35 mm
Maximum rotation rate 30 revolutions per second
Optical encoder 2000 divisions/rev, bidirectional
Rechargeable battery Lithium-polymer
Logging Yes
Connectivity Direct USB or via Bluetooth 4.0

Battery and Logging

Stored Data Points Memory (Logging) 1 >55,000
Battery – Connected (Data Collection Mode) 2 >12 hr
Battery – Logging (Data Logging Mode) 3 NA
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.


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

Rotational Dynamics

Students use hanging masses to apply torque to a rotating arm and measure its angular acceleration. After varying the torque, they experimentally determine the mathematical relationship between net torque and angular acceleration.

Rotational Dynamics

In this lab, students use rotary motion sensors to determine the mathematical relationship between torque, rotational inertia, and angular acceleration of a rotating object.

Supporting Documents

Wireless Rotary Motion Sensor Manual English 1.62 MB