Development of High Perfomance CTD sensor

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  • Takahashi Yukio
    Department of Marine Technology Development, Marine Technology and Engineering Center (MARITEC), Japan Agency for Marine-Earth Science and Technology (JAMSTEC)
  • Watari Kensuke
    Department of Marine Technology Development, Marine Technology and Engineering Center (MARITEC), Japan Agency for Marine-Earth Science and Technology (JAMSTEC)
  • Ishihara Yasuhisa
    Department of Marine Technology Development, Marine Technology and Engineering Center (MARITEC), Japan Agency for Marine-Earth Science and Technology (JAMSTEC)

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  • 高精度CTDセンサーの開発

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<p>High performance CTD sensor for mooring system and profile measurement was developed. Circuit performance for realizing the target resolution (water temperature 0.0001 degC, conductivity 0.00001 S/m) was obtained by developing sensor signal processing method and circuit configuration. We developed a thermistor probe which has low depth dependence and a response time sufficiently short for profiling measurements. We also developed a conductivity sensor device of platinum electrode with high performance and repeatability. The new sensors have been calibrated and repeatedly tested in situ ((m-)TRITON buoy measurement and CTD castings) to improve the quality. As a result, the target performance (initial precision 0.002 degC, 0.0003 S/m, and time drift characteristics to withstand long-term mooring) comparable to SBE sensor (SBE37), was obtained.</p>

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