Oxygen concentration detector

Abstract

Abstract PURPOSE:To enhance the stability of the titled detector, by a method wherein a solid electrolyte constituting an oxygen concn. cell or a resistor having negative temp. coefficient of resistance provided in adjacent relation thereto is heated by supplying a current thereto and the oxygen concn. in a gas is measured by the solid electrolyte. CONSTITUTION:An AC power source A is connected to a solid electrolyte 2E constituting an oxygen concn. cell 2 or a resistor having negative temp. coefficient of resistance provided in adjacent relation thereto through an inductance 11 as a current limiting circuit. This AC power source A has positive relation of input voltage and AC output frequency. A current flowing through the solid electrolyte 2E or the resistor is limited to predetermined value by the inductance 11 to supply a current to the solid electrolyte 2E or the resistor to heat the same. The oxygen concn. in a gas is detected by the solid electrolyte 2E constituting the oxygen concn. cell 2 heated by the supply of a current.

Inventors

• 👤 Shunzo Mase
• 👤 俊三 間瀬
• 👤 Shigeo Soejima
• 👤 繁雄 副島

Bibliographic Details