Model A109-111 Oxygen Analyzer is the latest company the percentage of oxygen analyzers. It is a test oxygen content in the 0-95% level at the perfect solution. You do not like to use the same battery type sensor in the 6-12 months of purchase . storage . replacement . our products can significantly reduce maintenance costs. The instrument equipped with a revolutionary . non-expendable-zirconia sensor . thus providing an unmatched stability and accuracy . even if the temperature at -20 ?C - +55 ?C Swing . product performance still showed the same effect . Without calibration gases and gas support (and only needs to be completed on the air) when you row in the 0-25% oxygen use . the product life expectancy of up to 10 years. If it is intermittent use . life will be longer. Model analysis of the design is very compact and durable. It uses an advanced microprocessor-based technology . large screen . easy-to-read digital LCD-use PC interface internal data transfer and download your data 0-10-1 VDC output . and all are standard configuration . Model A109-111 is a high-performance . low-cost . suitable for general application of the best option. Q Can the background for the 95% CO2 gas? Answer Yes. Q still a small amount of background gas H2S can be measured? Answer increase of H2S removal of the device can be. Q background gas is water gas can be measured? Answer Canada filters can be installed.