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1. An instrument used for measuring small differences in electrical potential.
2. An electrical resistor of fixed total resistance between two terminals, but with a third terminal attached to a slider that can make contact at any desired point along the resistance.
[L. potentia, power, + G. metron, measure]


A voltmeter.

calibration potentiometer

A mechanically adjusted resistance used as a calibration control on many instruments. It adjusts a voltage or current within the device.
References in periodicals archive ?
We also explored the dissociation constant (pKa) values of the synthesized piperidine derivatives using a standard potentiometric titration method [11, 12] and the obtained values were compared with the predicted values obtained using ACD software.
Ramanathan, "Potentiometric determination of proton activities in solutions containing hydrofluoric acid using thermally oxidized iridium electrodes," Analyst, vol.
Also, principal component analysis (PCA) was used as an unsupervised pattern recognition technique with the objective of verifying if the potentiometric signals generated by the E-tongue would naturally split the olive oils according to the "type x time" of heating.
The free acidity of the solution containing [Fe.sup.3+] was also studied by potentiometric titration.
The mole fraction of N-acetylglucosamine residues ([F.sub.A]) was determined using potentiometric titration, as described by Raymond et al.
The acid-base equilibria of the [[Pd(MME)([H.sub.2][O.sub.2])].sup.2+] complex is characterized by fitting the potentiometric data to various models.
In this study, potentiometric and theoretical studies of some polysubstituted thiohydantoin-pyrrolidine fused ring systems are reported.
The experimental data from potentiometric titration were analyzed with three models, assuming the presence of one, two, and three types of functional groups on biomaterial surface, respectively [20].
APF was calculated by using a modification of the PDA method, which permitted a theoretical characterization of the surface properties of solids and to identify the functionality of the acid sites present on the surface of the material from potentiometric experimental data and protonation constants, pK (Villarreal et al, 2012).