Nox sensor

Abstract

Abstract PURPOSE:To improve the accuracy of detecting NOX in a gas to be measured by forming two electrochemical oxygen partial pressure detecting elements into integral structure. CONSTITUTION:The 1st electrochemical oxygen pump cell is formed of outside and inside pumps 20, 22 and the solid electrolyte part of a body 12, and the 1st electrochemical oxygen sensor is formed of measuring and reference electrodes 24, 26 and the solid electrolyte part of the body 12 to constitute the 1st electrochemical oxygen partial pressure detecting element as a whole. The 2nd electrochemical oxygen partial pressure detecting element is similarly constituted of the outside and inside pump electrodes 30, 32, the measuring and reference electrodes 34, 36 and the solid electrolyte part of the body 12. The NOX content in the gas to be measured is obtd. in accordance with the two information values of the oxygen partial pressures from both the detecting elements. Since the two detecting elements are made into the integral structure within the element, the oxygen partial pressure near the NOX detecting part is measurable and there is no temp. difference between the oxygen partial pressure detecting part and the NOX detecting part. Since the temp. to affect the output is negligible, the accuracy of detecting the NOX in the gas to be measured is improved.

Inventors

• 👤 Makoto Noda
• 👤 野田　眞
• 👤 Nobuhide Kato
• 👤 伸秀 加藤
• 👤 Hiroshi Kurachi
• 👤 寛 倉知

Bibliographic Details