1. Introduction
RRDE-3A is a constant rotation system for use in hydrodynamic modulation rotating ring disk electrochemistry. A 12 mm diameter electrode with short stainless steel shaft provides for a miniature and concentric circle electrode system that is capable for highly accurate rotation and modulation even at radial modulation rates or wave forms.
RRDE-3A is electronically controlled by a proportional-integral closing loop circuit driving as an DC servo-motor. Electrodes are small and rapidly interchangeable. The unit also provides an adjustable valve system for inert gas purging inside the cell vial.
RRDE-3A is able to be operated as a stand-alone unit and directly controlled by CH Instruments Inc., Bioanalytical Systems Inc. Electrochemical Analyzers or other instruments. When the analysis starts, a built-in gas control allows purging the sample. Besides, the access to glass cell is easy for rinsing, cleaning, and replacing the electrodes. It is easy to remove and replace the cell vial.
Features
- 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
Specifications
| Size | 190 (w) x (Base: 230, Body: 120)(d) x 400 (h)mm |
| Weight | 3.5 kg |
| Rotational range | 100 to 8,000 rpm |
| Rotation stability | Error, < 1% at 100 to 1,000 rpm < 0.5% at > 1,001 rpm |
| Ring/Disk insulation resistance | > 10 M ohm |
| Electrode to lead pin contact resistance | 5 ohm |
| Rotator shaft | Stainless steel |
| Motor | 12 V, ironless core, low inertial DC servo |
| Power | < 100 VA 100-240 VAC, 50/60 Hz |
| Operating temperature | 10 to 50 deg C |
| Relative humidity | ≦ 80% |
| Inlet gas pressure | 5 psi (34 KPa) maximum |
| Remote control | Motor ON/OFF TTL or relay input to back panel connection Purge TTL or relay input to back panel connection |
Accessories
| Option | |
For RRDE electrode Click here for detail |
Platinum ring disk working electrode |
| Platinum ring-glassy carbon disk working electrode | |
For RDE electrode Click here for detail |
Glassy carbon disk electrode |
| Platinum working disk electrode | |
| Gold working disk electrode | |
For DRE electrode Click here for detail |
DRE-PGK Pt ring/GC disk replaceable electrode |
| DRE-GCK disk replaceable electrode | |
| Electrodes of other materials and diameters will be fabricated on a custom basis. | |