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Conductance is a measure of a material's ability to conduct electricity. It is the reciprocal of resistance and is measured in siemens (S). Conductance can be measured using a conductivity meter, which consists of a conductivity cell, a power supply, and a voltmeter.
The conductivity cell is a container that holds the sample to be measured. The power supply provides a voltage to the conductivity cell, and the voltmeter measures the current that flows through the sample. The conductance of the sample is then calculated using Ohm's law.
Conductance measurements are used to characterize the electrical properties of materials, such as metals, semiconductors, and electrolytes. They can also be used to monitor the concentration of ions in a solution or to determine the purity of a material.