Check the listing for details. Servomex 4900 O2 Analyzer With CO. Condition: For parts or not working. Listed at 3500.00 USD. The Servomex 4900 O2 Analyzer With CO is a top-of-the-line tool for measuring oxygen and carbon monoxide levels in various industries. Its reliable performance and advanced features make it a must-have for professionals who need accurate readings for their work. This analyzer is designed to provide precise measurements of oxygen and carbon monoxide in a variety of gas and combustion applications. It is ideal for use in business and industrial settings, as well as in the test, measurement, and inspection field.