Potentiostat
The WheeStat Potentiostat
The WheeStat is our computer controlled three electrode potentiostat. We offer the WheeStat fully assembled with firmware installed. A Windows compatible graphic user interface is provided on a usb memory stick.
Hardware
The WheeStat is controlled by a Raspberry Pi Pico microcontroller board that interfaces with your host computer. It is powered over usb and can source 40 mA at +/- 4.1 volts at the working electrode and +/- 12 volts at the counter electrode.
Supported Experiments:
The firmware and user interface support a number of common electrochemical experiments, including the following:
Cyclic Voltammetry (CV)
Linear Sweep Voltammetry
Differential Pulse Voltammetry (DPV)
Anodic and Cathodic Stripping Voltammetry
Chronoamperommetry (one and two step)
Repetitive CV and DPV experiments
Cyclic Square Wave Voltammetry
Normal Pulse Voltammetry
Working Attributes:
Working electrode voltage range: +4.10 volts to -4.10 volts
Counter electrode voltage range: +12 to -12 volts
Standard voltage step: 10 mV
Theoretical minimum voltage step: 2 uV
Standard current limits: +40 to -40 mA
Maximum measurement rate: 120 data points / s
Standard measurement precision: 12 bits (1/4095)
Price:
$200 USD plus shipping
Software.
The microcontroller that drives the new WheeStat is a Raspberry Pi Pico and comes loaded with software written in Arduino.
The WheeStat comes with our Graphic User Interface loaded on a USB flash drive. The GUI comes as an executable program for Windows 32 and 64 bit computers as well as source code written in the program Processing. At this point, we do not have the GUI application for Mac. We believe that the Mac App for OSX can be generated relatively easily (see this video). All experimental parameters are adjusted from your computer using our GUI. Data are displayed in real time on the GUI chart. Sequential experiments can be overlayed on the GUI chart. Once collected, data can be saved as CSV files and opened in excel (or another spreadsheet program).
All software is open source. Future updates can be downloaded for free from our GitHub site.