Arnold, White & Durkee
Oxygen sensor
 In an oxygen sensor having a plate-shaped oxygen sensor element, a measuring electrode on the broader width surface of the plate-shaped sensor element, and a protective cover covering the plate-shaped sensor element and having gas inlet holes for introducing a gas to be measured therein, a cylindrical body is provided between the plate-shaped sensor element and the protective cover in such fashion as to avoid direct impingement of the gas to be measured upon the measuring electrode, whereby the oxygen sensor can provide good measurements of the gas with high precision and a constant .lambda. controlling point. 
NGK Insulators, Ltd.
G
G01N
inventional
Nobuhide Yasuhiko
Kato Hamada