Check the listing for details. Teledyne 311-D Portable Trace Oxygen Analyzer. Condition: Used. Listed at 799.99 USD. Introducing the Teledyne 311-D Portable Trace Oxygen Analyzer, a reliable and efficient tool for measuring oxygen levels in various environments. This analyzer is designed by Teledyne, a trusted brand in the industry, and is perfect for use in business and industrial settings, as well as in research and development. With its compact and lightweight design, the Teledyne 311-D is easy to transport and use, and can be operated by individuals with minimal training. This analyzer is ideal for measuring oxygen levels in gases and combustion analyzers, and is compatible with a wide range of gas and combustion samples. Invest in the Teledyne 311-D Portable Trace Oxygen Analyzer today and gain accurate and reliable oxygen measurements for your business and research needs.