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Data collection instruments (loggers)
https://niwa.co.nz/our-services/instruments/instrumentsystems/products/data-collection-loggers
Data Logger - DAA H-500XL
https://niwa.co.nz/our-services/instruments/instrumentsystems/products/data-collection-loggers/h-500xl
Dissolved Oxygen Sensor - Zebra-Tech D-Opto SDI-12
https://niwa.co.nz/our-services/instruments/instrumentsystems/products/water-quality-instruments/dissolved-oxygen-sensor---zebratech-d-opto