Figaro Engineering Inc.

Tomoko Yoshimura

Hideki Okoshi

Tohru Nomura

Yutaka Kishimoto

Yuichiro Tajiri

A base is provided with a concave and three leads, and the central lead is bent to the side opposite to the concave, and the other leads are bent to the side of the concave. A central electrode of a sensor element is attached to the central lead and the bottom of the concave and a coil serving as both a heater and an electrode is attached to the other leads to support the sensor element on a small base at four points.

Gas sensor and method for producing it

A central electrode is arranged in a coiled heater electrode They are buried in a SnO -based inner area and the entirety is covered by a filter The volume of the inner area is set at from 1&times;10 mm to 16&times;10 mm , the total volume of the bead is set at from 15&times;10 mm to 70&times;10 mm , and the ratio of the total volume of the bead to the volume of the inner area is set at from four to twenty to bring the sensor resistance in CO and that in methane closer to each other and increase the selectivity from hydrogen.

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Osaka, Japan

Tomoko Yoshimura