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Sensors & Electronics

Chemical Sensors

In Situ Ground Water Probe (22)

Problem: Develop in situ probe to measure the temperature, pH, and concentration of key ions (Cl, Br) of ground water

Chemical Sensors Physical Parameter Sensing

Project Activity Scope (from Technical Overview Chart): Mechanisms through Instruments

PNNL Solution:

  • Designed probe with three sensors mounted coaxially in 1.12-inch-dia. tube
  • Designed long-lasting reference electrode using capillary salt bridge
  • Demonstrated probe performance
  • Granted US patent #5,490,916
  • Commercialized through license to Instrumentation Northwest Inc.

Capabilities Employed to Meet Client Needs: Mechanical engineering/probe packaging; sensor specification and evaluation; reference electrode design and evaluation; sensor integration; probe performance testing and evaluation; project management.

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Contact: Peter Eschbach

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