Development of an Integrated ISFET pH Sensor for High Pressure Applications in the Deep-Sea
2010
Johnson, Kenneth S. | Gu, Yuandong | Martz, Todd R. | Riser, Stephen C.
The long-term goals of this project are to enable observations of pH in the ocean using sensors deployed on autonomous platforms. These systems will enable robust, basin-scale observations of changing pH driven by natural and anthropogenic processes. Develop a robust and stable pH sensor for deep-sea applications that is based on the Honeywell Durafet Ion Sensitive Field Effect Transistor (ISFET). The sensor should operate to depths of at least 2000 m. It should have a precision of plus or minus 0.001 pH and a stability of 0.005 pH over periods up to 5 years throughout the oceanic temperature and salinity range.
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