A Miniature, High Precision Conductivity and Temperature Sensor System for Ocean Monitoring

Huang, Xi; Pascal, Robin W.; Chamberlain, Katie; Banks, Christopher J. ORCID: https://orcid.org/0000-0003-4457-0876; Mowlem, Matthew; Morgan, Hywel. 2011 A Miniature, High Precision Conductivity and Temperature Sensor System for Ocean Monitoring. IEEE Sensors Journal, 11 (12). 3246-3252. 10.1109/JSEN.2011.2149516

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Abstract/Summary

A miniature high precision conductivity and temperature (CT) sensor system has been developed for ocean salinity monitoring. The CT sensor is manufactured using micro fabrication technology. A novel seven-electrode conductivity cell has been developed which has no field leakage. This is combined with a platinum resistor temperature bridge to produce an integrated CT sensor. A generic impedance measurement circuit has been developed, with three-parameter sine fitting algorithm. It has a 1 month battery life at 10 s sampling interval. Calibration results show that the initial CT accuracies are ±0.03 mS/cm and ±0.01°C, respectively. Testing of the CT sensor has been performed in the north Atlantic and revealed drift in sensor readings after five weeks of operation.

Item Type:	Publication - Article
Digital Object Identifier (DOI):	10.1109/JSEN.2011.2149516
ISSN:	1530437X
Additional Keywords:	Calibration, Conductivity, Electrodes, Resistors, Temperature measurement, Temperature sensors, Voltage measurement, Conductivity sensor, low-power electronics, measurement system, ocean salinity, temperature sensor
Date made live:	16 Jan 2012 14:50 +0 (UTC)
URI:	https://nora.nerc.ac.uk/id/eprint/308141

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