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  2. Potentiometer (measuring instrument) - Wikipedia

    en.wikipedia.org/wiki/Potentiometer_(measuring...

    A potentiometer being calibrated and then measuring an unknown voltage. R 1 is the resistance of the entire resistance wire. The arrow head represents the moving wiper.. In this circuit, the ends of a uniform resistance wire R 1 are connected to a regulated DC supply V S for use as a voltage divider.

  3. Electroanalytical methods - Wikipedia

    en.wikipedia.org/wiki/Electroanalytical_methods

    Therefore, the difference in potential between the two electrodes gives an assessment of the sample's composition. In fact, since the potentiometric measurement is a non-destructive measurement, assuming that the electrode is in equilibrium with the solution, we are measuring the solution's potential.

  4. Potentiometer - Wikipedia

    en.wikipedia.org/wiki/Potentiometer

    Linear taper potentiometers [4] are used when the division ratio of the potentiometer must be proportional to the angle of shaft rotation (or slider position), for example, controls used for adjusting the centering of the display on an analog cathode-ray oscilloscope. Precision potentiometers have an accurate relationship between resistance and ...

  5. Potentiometric titration - Wikipedia

    en.wikipedia.org/wiki/Potentiometric_titration

    In analytical chemistry, potentiometric titration is a technique similar to direct titration of a redox reaction. It is a useful means of characterizing an acid. No indicator is used; instead the electric potential is measured across the analyte, typically an electrolyte solution.

  6. Ion-selective electrode - Wikipedia

    en.wikipedia.org/wiki/Ion-selective_electrode

    The most common types of reference electrodes used in analytical chemistry include the standard hydrogen electrode, the saturated calomel electrode, and the Ag/AgCl electrode. [ 3 ] The standard hydrogen electrode (SHE) is the primary reference electrode that has a potential of 0 volts at all temperatures and a pressure of 1 atm.

  7. Linear sweep voltammetry - Wikipedia

    en.wikipedia.org/wiki/Linear_sweep_voltammetry

    In one example, [7] linear voltammetry was used to examine direct methane production via a biocathode. Since the production of methane from CO 2 is an irreversible reaction, cyclic voltammetry did not present any distinct advantage over linear sweep voltammetry. This group found that the biocathode produced higher current densities than a plain ...

  8. Butler–Volmer equation - Wikipedia

    en.wikipedia.org/wiki/Butler–Volmer_equation

    The upper graph shows the current density as function of the overpotential η . The anodic and cathodic current densities are shown as j a and j c, respectively for α=α a =α c =0.5 and j 0 =1mAcm −2 (close to values for platinum and palladium).

  9. String potentiometer - Wikipedia

    en.wikipedia.org/wiki/String_potentiometer

    A string potentiometer is a transducer used to detect and measure linear position and velocity using a flexible cable and spring-loaded spool. Other common names include string pot , cable-extension transducer , draw wire sensor , and yo-yo sensor .