Alkalinity Sensor

The NOC has developed a miniaturised total alkalinity sensor using microfluidic lab-on-chip (LOC) technology. This sensor allows the collection of in situ data with high spatial-temporal resolution throughout the water column (sample time ~10 minutes). The technology uses an open cell approach with spectrophotometric pH determination.  It has an adjustable range, defaulting to 2000-2600 umol/kg and high accuracy and precision.

The first generation of this sensor has been deployed on pontoons, landers, a ship’s underway system, autonomous underwater vehicle, and a remote-operated vehicle.



Schaap, A.; Papadimitriou, S.; Mawji, E.; Loucaides, S.; Mowlem, M. An Autonomous Sensor for in Situ Measurement of Total Alkalinity. In Goldschmidt Abstracts; 2019; p 2980.

Wang, Z. A.; Moustahfid, H.; Mueller, A. V.; Michel, A. P. M.; Mowlem, M.; Glazer, B. T.; Mooney, T. A.; Michaels, W.; McQuillan, J. S.; Robidart, J. C.; Churchill, J.; Sourisseau, M.; Daniel, A.; Schaap, A.; Monk, S.; Friedman, K.; Brehmer, P. Advancing Observation of Ocean Biogeochemistry, Biology, and Ecosystems With Cost-Effective in Situ Sensing Technologies. Front. Mar. Sci. 2019, 6.