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Title: Current-biased potentiometric NOx sensor for vehicle emissions

Patent ·
OSTI ID:903352

A nitrogen oxide sensor system for measuring the amount of nitrogen oxide in a gas. A first electrode is exposed to the gas. An electrolyte is positioned in contact with the first electrode. A second electrode is positioned in contact with the electrolyte. A means for applying a fixed current between the first electrode and the second electrode and monitoring the voltage required to maintain the fixed current provides a measurement of the amount of nitrogen oxide in the gas.

Research Organization:
Lawrence Livermore National Laboratory (LLNL), Livermore, CA (United States)
Sponsoring Organization:
USDOE
DOE Contract Number:
W-7405-ENG-48
Assignee:
The Regents of the University of California (Oakland, CA)
Patent Number(s):
7,153,401
Application Number:
10/378,578
OSTI ID:
903352
Country of Publication:
United States
Language:
English

References (4)

The effect of additives in tin oxide on the sensitivity and selectivity to NOx and CO journal January 1995
Potentiometric NOx sensor based on stabilized zirconia and NiCr2O4 sensing electrode operating at high temperatures journal February 2001
Critical review of nitrogen monoxide sensors for exhaust gases of lean burn engines journal August 2000
Trends in the development of solid state amperometric and potentiometric high temperature sensors journal November 2000

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