Semiconducting oxide gas sensors
First Claim
1. In the method of detecting the presence of a target gas, wherein said method comprises the steps of exposing a sensor to an atmosphere that may contain said target gas, and measuring the electrical resistance of said sensor, the improvement wherein said sensor includes a sensor element formed of Cr.sub.(2-x) Tix O3, where 0.3 ≦
- x≦
0.05, and said target gas is a hydrocarbon other than methane, alcohols, aldehydes, ketones, ethers, esters, hydrogen sulphide, sufphur dioxide or carbon monoxide.
5 Assignments
0 Petitions
Accused Products
Abstract
The selectivity of response of resistive gas sensors to specific gases or vapors is improved by the selection of specified gas-sensitive materials which are not previously known for the applications described, which include detection of hydrocarbons in the presence of CO, H2 S, SO2, chlorine, NO2, CO2 (especially in low concentrations), CFC'"'"'s, ammonia, free oxygen by determination of partial pressures, and numerous organic gases and vapors.
36 Citations
11 Claims
-
1. In the method of detecting the presence of a target gas, wherein said method comprises the steps of exposing a sensor to an atmosphere that may contain said target gas, and measuring the electrical resistance of said sensor, the improvement wherein said sensor includes a sensor element formed of Cr.sub.(2-x) Tix O3, where 0.3 ≦
- x≦
0.05, and said target gas is a hydrocarbon other than methane, alcohols, aldehydes, ketones, ethers, esters, hydrogen sulphide, sufphur dioxide or carbon monoxide. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11)
- x≦
Specification