Precise Evaluation of Liquid Conductivity using a Multi-channel Microfluidic Chip and Direct-current Resistance Measurements

•We developed a measurement and analysis method for the precise evaluation of liquid conductivity.•For this method, we designed a multi-channel microfluidic chip that had multiple channels with varying channel lengths.•The conductivity of various solutions could be accurately determined from the proposed method without calibration.•To verify the accuracy of the proposed method, we compared the EIS results with those obtained from the proposed method.•This simple method for determining liquid conductivity could be widely employed in various electrochemical applications.