Bridge for Measuring the Impedance of Metal Microelectrodes

Abstract
This note describes an ac bridge for measuring the series components of high‐impedance metal‐liquid interfaces. The real and imaginary components of the impedance may vary over a wide range. All frequency‐independent residual error‐introducing elements in the measuring circuit may be balanced out through a single square‐wave initial balance step. This allows accurate, direct‐reading measurement of the unknown. The bridge design is based upon superposition of frequency‐independent bridge circuits.

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