CEMTEK CEM system for NOx and Oxygen monitoring, complete with sample conditioning, monitoring software, PLC controls, and networking. This system has a Servomex Model 1440 O2 Analyzer and a Thermo Model 42i Low Source NOx Analyzer, with a Maple Systems touch screen controller running CEMLink 6 software for the operator interface. It also features an M&C Sample Gas Cooler, M&C Flow Controls, a sample pump, and an Allen Bradley CompactLogix PLC. The entire system is contained in an Ekto insulated enclosure with A/C and it has an external stand with regulators for the cal gas cylinders.