Gas sensor

Abstract

Abstract PURPOSE:To stabilize sensitivity with H2 and alcohol with a gas sensor which utilizes the change in the resistance value of SnO2 by adding vanadium oxide at 40mug-10mg in terms of metallic vanadium for each 1g SnO2 to SnO2. CONSTITUTION:A gas sensitive film 6 consisting of SnO2 is coated on an insulating pipe 4 consisting of alumina, etc. and is then sintered to constitute a gas sensor 2. The resistance value of the film 6 is detected with a pair of electrodes 8 and 12. A heater 12 is inserted into the pipe 4 to heat the sensor 2 to a required temp. Vanadium oxide is added to SnO2 at 40mug-10mg in terms of metallic vanadium for each 1g SnO2. The sensitivity with alcohol and H2 is thus stabilized without spoiling the sensitivity and the deterioration of the sensor with age is prevented.

Inventors

• 👤 Takashi Yamaguchi
• 👤 隆司 山口

Bibliographic Details