The NEXIS Total Nitrogen analyzer is a horizontal oriented combustion analyzer with highest modularity and advanced detectors to measure trace level nitrogen concentrations in a wide range of liquids, solids and LPG/Gas sample types. The NEXIS TN analyzer configuration detects these substances through a uniquely high effective NEX-ZTM combustion tube design that includes Chemiluminescence (CLD) detection technique. The NEXIS TN model is designed to facilitate high sample throughput by optional addition of the AS120 liquid autosampler that will support both syringe and boat introduction methods with high performance and reliability. This solution provides a fully automated trace level Total Nitrogen analyzer, which can be extended with heated sample tray capability. For Gas and LPG samples the NEXIS TN analyzer can be connected to a NEXIS GM module to facilitate this kind of samples with fast connectivity and ease of use operation through NEXIS LINK software.