Electrical Resistivity Sensing Methods and Implications
Marios Sophocleous
- 31 May 2017
Abstract: This chapter discusses and explains the basic operating principles of various measuring methods of resistivity for materials in both liquid and solid phase. It provides explanations for two-, three-, and four-pole as well as toroidal resistivity cells. The van der Pauw technique is explored as a step-by-step procedure to estimate the resistivity of a material with no arbitrary shape. The special case of sheet material resistivity and resistance is explained in more detail, and equation for that special problem is simplified. It further provides information on common experimental errors and a short guideline to improve the reliability and accuracy of the measurements. The implications and challenges faced during resistivity measurements are explored and explained with ways to compensate for errors due to temperature and capacitance changes. In addition, the way to experimentally determine the cell constant of a cell is described and the necessity for calibration is clearly explained. It further provides information to overcome the standard problem of polarisation when the resistivity of solutions with high ionic content is investigated.
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Citations
Frontiers and Challenges in Electrochemical Corrosion Monitoring; Surface and Downhole Applications.
TL;DR: A summary of corrosion types, corrosion causing chemical species, different destructive and non-destructive technologies used in monitoring corrosion and a comprehensive overview of the state-of-the-art of various electrochemical techniques used for surface and downhole corrosion monitoring are provided.
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A Durable, Screen-Printed Sensor for In Situ and Real-Time Monitoring of Concrete's Electrical Resistivity Suitable for Smart BuildingsCities and IoT
Marios Sophocleous,Pericles Savva,Michael F. Petrou,John Atkinson,Julius Georgiou +4 more
- 20 Sep 2018
TL;DR: In this paper, a durable, low-cost, screen-printed resistivity sensor in concrete for real-time measurements, with the aim of correlating concrete's electrical resistivity with moisture content.
Effect of Dip-Coating Cycles on the Structural and Performance of ZnO Thin Film-based DSSC
TL;DR: In this paper, a dip-coating method was used for the deposition of ZnO thin films on fluorine-doped tin oxide glass substrates, and the structural, electrical and optical properties of these ZnOs thin films were characterized by XRD, FESEM, four-point probe, UV-Vis spectroscope and room temperature PL spectrograph.
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A versatile, stand-alone system for a screen-printed, soil-sensing array for Precision Agriculture
Marios Sophocleous,Andreas Karkotis,Julius Georgiou +2 more
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TL;DR: This paper presents a low-cost, versatile, stand-alone, soil quality monitoring system for Precision Agriculture based on a screen-printed soil-sensing array that is compatible with Bluetooth, WiFi and LoRa communication technologies.
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Modeling and Performance Comparison of Screen-Printed, Impedance Spectroscopy Probes for Harsh Environments
TL;DR: In this article, the simulated performance of three different screen-printed probe geometries for Electrochemical Impedance Spectroscopy probes for use in harsh environments was compared. The best performing probe, which is equipped with guarding electrodes that are proven to help with the electric field uniformity, shows a linear response with the medium's resistivity using a 1 kHz sinusoidal input current with a sensitivity of 0.163 mV/Qm in the range of 2.5 Qm to 50 Qm in a medium with relative permittivity of 20.1 degrees
5
References
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Electroanalytical Methods : Guide to Experiments and Applications
Fritz Scholz
- 01 Jan 2010
TL;DR: In this article, the electrical double layer and its structure of the double layer of the electrical circuit are discussed. And cyclic voltammetry is used to measure the electrical conductivity.
416
Electrical Measurement, Signal Processing, and Displays
John G. Webster
- 15 Jul 2003
TL;DR: ELECTROMAGNETIC VARIABLESMEB MEASUREMENT Voltage Measurement Current Measurement Power Measurements Power Factor Measurement Phase Measurement Energy Measurement Electrical Conductivity and Resistivity Charge Measurement Capacitance and Capacititance Measurements Permittivity Measurement Electric Field Strength Magnetic Field Measurement Permeability and Hysteresis Measurement Inductance Measurement Immittance Measurement Q FactorMeasurement Distortion Measurement Noise Measurement as discussed by the authors
152
•Dissertation
Thick-film underground sensors
Marios Sophocleous
- 01 Sep 2015
TL;DR: In this paper, the authors describe the design, fabrication and deployment of screen printed sensor arrays for underground monitoring of soil quality as a result of monitoring specific water parameters infiltrating the soil.
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