MSR evo Electrode Rotator: Upgraded Replacement

Pine Research is proud to announce the next evolution in our half-century long legacy of world-famous electrode rotators: the MSR evo. This rotator is a drop-in replacement for the now legacy AFMSRCE rotator, and is also a considerable upgrade in terms of its technical capabilities and ease of operation. All electrochemical experiments and accessories previously used with the AFMSRCE, including shafts, cells, accessories, rotating disk electrodes (RDEs), rotating ring-disk electrodes (RRDEs), and rotating cylinder electrodes (RCEs) can still be used with the MSR evo. For those customers who have existing AFMSRCE rotators in their lab and wish to purchase the upgraded MSR evo, all their previously-purchased items listed above will also work with the MSR evo as well.

The MSR evo is a state-of-the-art electrode rotator that provides excellent steady-state control at constant rotation rates, and also offers outstanding acceleration/deceleration control for those applications where the rotation rate must be modulated. The base rotation rate (for steady-state constant rate control) may be manually adjusted from 0 to 10,800 RPM by turning a ten-turn potentiometer knob located on the front panel of the control unit. When the rotator is running (front panel Status light is illuminated green), a built-in tachometer measures the actual rotation rate and this rate is continuously displayed on the front panel of the control unit. When the rotator is paused (front panel Status light is illuminated red), the display instead shows the set point. The MSR evo will not start rotating until the Run/Pause button is pressed. Manually turning the knob and observing the rotation rate is the most common way that rotation rate is controlled.

Automated control of the rotation rate is possible when the MSR evo is connected to a potentiostat system capable of supplying rotation rate control signal. While specific details vary from one system to another, the basic strategy is to use an analog signal output from a potentiostat that is proportional to the target rotation rate. This analog signal is carried by a cable to an 8-pin connector on the back of the MSR evo control unit. This connection permits the software that controls the potentiostat to also control the rotation rate using a constant voltage level (for steady-state rotation) or a more complex waveform such as a sine wave (for hydrodynamically modulated voltammetry).

The rotator is able to accurately follow complex waveforms and create the desired rotation rate response by using a 13,000 RPM, low inertia, permanent magnet DC motor in combination with a high voltage, bi-polar power supply. When adding a modulated input signal, the MSR evo can track and follow certain frequencies and amplitudes depending on the baseline rotation rate (MSR evo rotation rate limits: 0 to 10,800 RPM). For details on input signal modulation boundaries, see Section 2.1.1 or contact Pine Research directly.