Multichannel Electroosmotic Voltage Controller and Current Monitor

Multichannel Electroosmotic Voltage Controller and Current Monitor

Docket: UAH-P-16025


Due to its high flow rates and production of non-pulsating, plug-like flows, electroosmotic flow (EOF) is a popular, straightforward means of manipulating liquids in a microfluidic system. However, the primary drawback to using EOF in microfluidics has been the high voltages required to maintain significant flow velocities in large channels. These high voltages require large, bulky, table-top voltage controllers that typically supply DC voltages from 10V to several kV, and they offer no more than 8 electrodes.

Researchers at UAH have developed a compact, portable, EOF multi-channel low-voltage controller and current monitor. The controller is designed with an increased number of electrodes that switch between 0 and only a few dozen Volts. Voltage is supplied to a microfluidic device with a group of DAC converters connected to electrodes, and current is monitored by amplifying voltage differences across special circuit elements.

Benefits of the compact, low-voltage controller and current monitor include increased portability and safety, and the ability to reverse electrode polarity. Additionally, the controller is designed for future expansion.


  • Microfluidics
  • Lab-on-a-chip
  • DNA chips


  • Expandability
  • Low-voltage
  • Mass produceable controller on PCB


  • State of Development: Proof of concept
  • Licensing Status: Available for licensing
  • Patent Status: Proprietary