CTAS

Apparatus for measuring concentration of fuel vapor, oxygen, nitrogen oxide, hydrocarbon, methane, alcohol and hydrogen in air or gas; apparatus for measuring concentration of fuel vapor, oxygen, nitrogen oxide, hydrocarbon, methane, alcohol and hydrogen, and controlling air/fuel ratio in the exhaust gas from internal combustion engines, boilers, incinerators, gas turbines, generators and fuel cells; knock sensors; pressure sensors; temperature sensors; outdoor air sensors for measuring air quality; load sensors