From Geoscience Australia
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An instrument for simultaneous measurement of Eh and pH in boreholes

Created 17/10/2025

Updated 17/10/2025

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An instrument is described that measures Eh and pH simultaneously in boreholes. The temperature of the borehole fluid and its self-potential with respect to an up-hole mud probe can also be measured. Operation should be possible in water depths to 100 m. By connecting the pH electrode system in a feedback circuit, electrometer amp lifier performance is obtained from a cheaper, lower quality amplifier. Signal subtraction operations allow the same reference electrode to be used simultaneously for all measurements. Sources of error are reduced by careful guarding of the high-resistance input circuits and by using isolation amplifiers to prevent ground leakage currents. A number of future development possibilities are indicated.

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Field Value
Title An instrument for simultaneous measurement of Eh and pH in boreholes
Language eng
Licence Not Specified
Landing Page https://data.gov.au/data/dataset/18fddbbf-3c45-4fd8-9cb8-9132f539306b
Contact Point
Geoscience Australia Data
clientservices@ga.gov.au
Reference Period 20/04/2018
Geospatial Coverage Australia
Data Portal Geoscience Australia

Data Source

This dataset was originally found on Geoscience Australia "An instrument for simultaneous measurement of Eh and pH in boreholes". Please visit the source to access the original metadata of the dataset:
https://ecat.ga.gov.au/geonetwork/srv/eng/csw/dataset/an-instrument-for-simultaneous-measurement-of-eh-and-ph-in-boreholes