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Updated: Oct 20, 2025

Design and Use of Multiplexed Chemostat Arrays
Published on: February 23, 2013
The multi-channel potentiostat: Development and evaluation of a scalable mini-potentiostat array for investigating
Pattawong Pansodtee1, John Selberg1, Manping Jia1
1Department of Electrical and Computer Engineering, University of California Santa Cruz, Santa Cruz, California, United States of America.
Abstract:
A potentiostat is an essential piece of analytical equipment for studying electrochemical devices and reactions. As the design of electrochemical devices evolve, applications for systems with multiple working electrodes have become more common. These applications drive a need for low-cost multi-channel potentiostat systems. We have developed a portable, low-cost and scalable system with a modular design that can support 8 to 64 channels at a cost as low as $8 per channel. This design can replace the functionality of commercial potentiostats which cost upwards of $10k for certain applications. Each channel in the multi-channel potentiostat has an independent adjustable voltage source with a built-in ammeter and switch, making the device flexible for various configurations. The multi-channel potentiostat is designed for low current applications (nA range), but its purpose can change by varying its shunt resistor value. The system can either function as a standalone device or remotely controlled. We demonstrate the functionality of this system for the control of a 24-channel bioelectronic ion pump for open- and closed- loop control of pH.
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