Current accessories available from ARC include: CO2 trap, Polyarc Test Mix, and a PID Heater Controller. ARC’s CO2 trap should be used before the Polyarc system to eliminate CO2 present in supply lines. Due to the complete conversion to methane, any CO2 present in supply lines will result in an increased baseline when using the Polyarc system. The Polyarc Test Mix is a check standard available to test Polyarc system quality. It can be used to indicate system performance and if a replacement is needed. The External PID Heater Controller allows the Polyarc temperature to be controlled when the GC cannot be used.