Measurement Method: NDIR measurement of dry base xCO2 in seawater equilibrated air and atmosphere
Manufacturer: Kimoto Electric Co., Osaka, Japan.
Model: MOG-701 using LI-7000 CO2 Analyzer by LI-COR
Frequency: 10sec (except during calibration routines)
Accuracy of CO2 Water: 0.1ppm
Accuracy of CO2 Air: 0.1ppm
Precision of CO2 Water: 0.01ppm
Precision of CO2 Air: 0.01ppm
CO2 Sensor Calibration:
Introducing CO2 standards to NIDR every 8 hours (10min each standard, 40 min. total) for air and 12 hours (15min each standard, 60 min total ) for seawater.
Manufacturer of CO2 calibration gases:
Taiyo Nippon Sanso Corporation, Japan. All of the standard gases are certified by NIES laboratory as WMO traceable standards.
CO2 gas concentrations are approximately 360, 380, 400, 420ppm for air, 270, 330, 390, 450ppm with non-CO2 gas as 0 ppm for seawater.