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Electrical Conductivity Logger - Unidata 6536D
https://niwa.co.nz/our-services/instruments/instrumentsystems/products/water-quality-instruments/conductivity-instrument-6536d
What does NIWA actually do?
https://niwa.co.nz/videos/what-does-niwa-actually-do
Water & Atmosphere 27, May 2022
https://niwa.co.nz/publications/water-and-atmosphere/water-atmosphere-27-may-2022