We were established in the year 1987, and since then we are engaged in manufacturing and exporting Micro IV Oxygen Gas Indicator. It is used for measuring the exhaust-gas concentration of oxygen for internal combustion engines in vehicles and automobiles. Thus, it helps in the calculation and dynamic adjustment of air-fuel ratio, so that catalytic converters can work optimally. Moreover, Micro IV Oxygen Gas Indicator also has applications in oxygen analyzers and thus can be found in anesthesia monitors, respirators and oxygen concentrators. Micro IV Oxygen Gas Indicator thus, monitors oxygen concentration inside protected volumes.