Development of an Integrated ISFET pH Sensor for High Pressure Applications in the Deep-Sea

Abstract

The long-term goals of this project are to enable observations of pH in the ocean at depths to 2000 m using sensors deployed on autonomous platforms, particularly profiling floats of the type used in the Argo array. 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 0.001 pH and a stability of 0.005 pH over periods up to 5 years throughout the oceanic temperature and salinity range. Capabilities will be demonstrated with deployments on four Webb Research Apex profiling floats.

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Document Details

Document Type
Technical Report
Publication Date
Sep 30, 2012
Accession Number
ADA571548

Entities

People

  • Kenneth S. Johnson
  • Stephen Riser
  • Todd R. Martz
  • Yuandong Gu

Organizations

  • Monterey Bay Aquarium Research Institute

Tags

Communities of Interest

  • Materials and Manufacturing Processes
  • Sensors

DTIC Thesaurus Topics

  • California
  • Climate Change
  • Deployment
  • Detectors
  • Economic Development
  • Economic Impact
  • Field Effect Transistors
  • High Pressure
  • Information Operations
  • Measurement
  • Observation
  • Oceanography
  • Oceans
  • Quality Of Life
  • Standards
  • Test Facilities
  • Ultraviolet Spectrophotometers

Fields of Study

  • Environmental science

Readers

  • Distributed Systems and Data Platform Development
  • Oceanography.
  • Parasitology and Pharmacology of Malaria.