RRDE-3A Rotating Ring Disk Electrode Apparatus Ver.3.0

RRDE-3A Rotating Ring Disk Electrode Apparatus Ver.3.0

RRDE-3A is a miniature rotator system for use in constant rotation and hydrodynamic techniques by rotating ring disk electrode in electrochemistry field. A short stainless steel shaft and 12 mm diameter electrode provide a concentric circle electrode system that is capable of high accuracy.

RRDE-3A is electronically controlled by a proportional-integral closed loop circuit driven by a DC servomotor. The compact electrodes are easily and rapidly interchangeable. The unit also provides an adjustable valve system for inert gas purging inside the cell vial.

RRDE-3A can be operated as a stand-alone unit and directly controlled by Model 2325 or other instruments. During or between electrochemical analyses, a built-in gas control allows purging the sample.

Besides, easy to remove and replace the cell vial, easy for rinsing, cleaning, and replacing electrodes.





New maintenance mode for the software

The new maintenance mode has been added to the software to facilitate the operation of the instrument and to help customers to keep track of the rotational wear and tear of the instrument, and to regularly clean and maintain the mechanical system in order to keep the instrument in optimum working condition.

RRDE-3A Ver.3.0 can perform the following settings in the maintenance mode added by the software:

  • Rotation speed setting unit change
  • Display of total rotation time and time to next warning
  • Clear warning display
  • Remote control input voltage monitoring

Click on the links below for detailed information on the operation of the maintenance mode:


  • Compact design & easy operation
  • Remote and manual controlled rotation
  • Quasi-oxygen free sample vial design (up to 200 mL)
  • Gas line connector is available
  • Remote and manual controlled purge lines
  • Teflon cap is adapted for ALS reference and counter electrodes
  • Operable as RDE and RRDE
  • Allows remote control from the PC (rotational speed ON/OFF and gas purge ON/OFF)
  • Cell lead connects directly to Model 2325 or other potentiostats
  • Open architecture for easy access to cell

Improvement points of Ver.3.0

RRDE-3A Ver.3.0 is electronically controlled by a proportional-integral closed loop circuit driven by a DC servomotor. The main frame structure has been improved and the weight of the instrument has been reduced from 6.0 Kg to 3.5 Kg.

Design changes

  • The position of the power switch has been changed from the back to the front (next to the LCD display) (easy to operate).
  • The color of the LCD display changed from green to blue.
  • The clear warning button on the back has been removed. It is operated by the built-in software (easy to operate).
  • The built-in power supply is changed to an external power supply (for easier maintenance of the instrument).




RRDE-3A contents

RRDE-3A Rotating Ring Disk Electrode Apparatus Ver.3.0 contents.

Electrodes and accessories list

RRDE Instructions videos

RRDE-3A easy setup

Follow this movie to setup your RRDE-3A in 5 minutes.
This movie will show you the content of the system, and the setting of the gas purging and rotation, in a manual mode. For the remote mode, please follow the instruction for the manual.

RRDE-3A disassembling/assembling for maintenance

This movie will show you how to disassemble your RRDE-3A for maintenance.
By disassembling the RRDE-3A, you can Replace carbon brushes, shaft, and bearing.

RRDE-3A maintenance procedure

This movie will Introduce the maintenance procedure of RRDE-3A rotating ring disk electrode device Ver.2.0.
If the RRDE-3A has been used for a long time, dirt may accumulate on the motor shaft side, resulting in measurement noise, this video will show you how to clean the shaft.
In addition, from Ver. 2.0, if the warning of cleaning (Cleanup shaft!) is displayed on the LCD display, please carry out cleaning instruction on this video.

RRDE-3A motor rotation issue

This movie will show you how to fix a rotation issue.
If the coupling has entred inside the aluminium frame, it may block the rotation.
If carbon brushes are broken, please change them.
Check the bearing assembly and the shaft. If they are not in good condition (corrosion, twisted…), please change them.

Spin coating

Spin coating using RRDE-3A rotating ring disk electrode device Ver.1.2.


For easy confirmation, we drop a large amount of water.


DRE Instructions videos