SAMI² - CO2
• Measures: partial pressure of CO2 in water (pCO2)
• pCO² range: 150 – 700 ppm (other ranges avail.)
• Duration: ~17,000 measurements
• Response time: ~5 minutes
• Precision: < 1 ppm
• Accuracy: ± 3 ppm based on lab calibration*
• Long-term drift: < 1 ppm over 6 months
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SAMI² - pH
• Seawater pHT (pH - total hydrogen ion scale)
• pH range: 7-9
• Salinity range: 30 - 36
• Duration: ~10,000 measurements
• Response time: ~3 minutes
• Precision: < 0.001 pH units
• Accuracy: ± 0.003 pH units (CRM* intercomparison)
• Long-term drift: < 0.001pH units over 6 months
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