Rotary Motion Sensor

datalogging sensors


Data Harvest

Product Description

A versatile sensor for measuring circular motion and oscillations.

Combined with EasySense software it makes an ideal demonstration to explain wave phases in SHM and why circular motion can be described as a sine waveform. 


40 seconds - Dynamics systems + light gates + rotary motion sensor


Teaching applications:
  • Study of pendulums and SHM
  • Time distance with a dynamics system
  • Motion of a Clifton(wedge) spirometer
  • Measurement of linear distance

Extension and advanced ideas:
  • Conservation of angular momentum
  • Movement of gas syringe
  • Distance of light intensity vs. separation in young’s slits diffraction measurements
  • Resonance of sound in an open pipe


Download Rotary Motion Sensor Manual  Doc No.: DS055 | Issue: 5


Download Rotary Motion Accessory Pack Manual |  Issue: 4 (Optional add-on, not included with the Rotary Motion Sensor)


Angular Position: 0 to 360 degrees (Res. 0.1 degree)
Angular velocity: (revs): ±4 revs/s (Resolution 0.01 rev)
Angular velocity: (rads): ±40 radians/s (Resolution 0.1 rad)
Linear distance (Rack Acc.) ±200 mm (Resolution 0.1 mm)
Distance: 11 mm Pulley: ±200 mm (Resolution 0.1 mm) 
Distance: 31 mm Pulley: ±2000 mm (Resolution 1 mm) 
Distance: 49 mm Pulley: ±2000 mm (Resolution 1 mm) 
Pendulum: ±20 degrees (Resolution 0.1 degree)


  • Attached three-tier pulleys have diameters of 11, 31 and 49 mm.
  • Comes with a mounting rod that can be screwed into the four sides of the sensor.
  • The rod can then be clamped into a suitable holding device.
  • Has a reset button that when pressed sets the output of the Sensor to centre point of the scale.
  • Some visible features are guides for accessories available to purchase separately, i.e. the Spoked Pulley (3177) and Rotary Motion Accessory pack (3288 - linear rack attachment, pendulum rod and angular momentum discs)





Plant growth (Biology (11-14) ebook)
Photosynthesis produces the food for plant growth, If this is true then a plant in good light will show growth. The worksheet outlines a method to measure plant growth as an increase in height over time.

Plant growth (Biology (14-18) eBook)
We teach the idea that photosynthesis powers a plants growth and development, but plant growth is too slow for the pace of modern teaching. Using a data logger allows you to monitor changes over the longer time that is required to see any growth




 Charles law (pressure volume) (Chemistry (14-18) eBook)
For a fixed mass of gas at constant pressure the volume is proportional to the temperature.The relationship between gas volume and temperature is studied in this investigation. The plot of the data as an x – y plot shows the linear nature of the relationship

Grahams law of effusion (Chemistry (14-18) eBook)
Effusion is the movement of a gas through a pin hole into a vacuum.Graham’s law of effusion was created by Thomas Graham. this is a model of its measurement.




Motion on a slope Rotary Motion sensor (Physics (14-18) Motion & Forces eBook)
Motion of a cart on a slope is recorded via the rotary motion sensor. A time distance line is produced. Tools within the software can create acceleration, velocity, kinetic energy and momentum graphs.

Simple hamonic motion In a spring (alternative distance measurement using a Rotary motion sensor). (Physics (14-18) Motion & Forces eBook)
change of distance with time is plotted alongside changes in force in this alternative study of SHM.

SHM: Impulse and change in momentum during an oscillation. (Physics (14-18) Motion & Forces eBook)
The force sensor is used to measure the restoring force in an oscillating spring. Distance and force are both monitored 

SHM: Calculation of K from a graph of F vs. (Physics (14-18) Motion & Forces eBook)
Create a force vs. extension graph and then calculate K, the spring constant 

Pendulum Period Length (Physics (14-18) Motion & Forces eBook)
The relationship between pendulum period and the length of the pendulum is for many counter intuitive, so much so that this investigation has been used as part of the CASE (Cognitive Acceleration in Science Education ) scheme. In a CASE investigation th -

Pendulum and energy analysis (Physics (14-18) Motion & Forces eBook)
Full analysis of the energy changes in a pendulum oscillation. Measure Displacement, velocity, acceleration, kinetic energy, potential energy and total energy

Observation of angular momentum 1 (Physics (14-18) Motion & Forces eBook)
Use two discs and a rotary motion sensor to study angular momentum

Conservation of angular momentum 2 (Physics (14-18) Motion & Forces eBook)
Use the principle of conservation of angular momentum to measure the the angular momentum of a spinning disc. Uses two discs and rotary motion sensor.

Single slit interference of light (Physics (14-18) : Light, Sound & Pressure eBook)
By using a data logger for the measurement of fringes you can collect information about the intensity of the light vs. distance as well as the more normal distance between fringes data. This will reveal another level of information and give a boost to classic practical. 

Charles' Law (Physics (14-18) : Light, Sound & Pressure eBook)
A study of the relationship between gas volume and temperature. while we use a contained system to hold the gas ( a gas syringe) the pressure is allowed to stay constant with any temperature change. 

Investigating resonance In a pipe (with a plot of distance) (Physics (14-18) : Light, Sound & Pressure eBook)
In this investigation the students will be able to study the relationship between the length of the pipe and its resonant frequency and be able to reveal the nodes and anti nodes created in a standing wave in the pipe. 



HK$ 1,749.00