Our DRK304A Oxygen Indexer is a reliable and precise piece of laboratory equipment, designed to measure the minimum concentration of oxygen in a mixture of gases that will support combustion of a material sample. As a factory, we take great pride in the quality and accuracy of our products and our Oxygen Indexer is no exception. It is easy to use, with a clear display and intuitive controls that allow for quick and accurate measurements. Made from high-quality materials, our Oxygen Indexer is built to last and provide consistent results with minimal maintenance. If you're looking for a dependable and accurate Oxygen Indexer, look no further than our DRK304A.