The chromaTCD is an automatic, industrial or laboratory gas analyzer. The temperature setting is isothermal. The sample comes through the sampling loop. Then the sample is injected into an analytical column (with an automatic valve) for separation. Different column can be used (e.g. packed column). After separation, the amount of each compound is measured using an universal detector, the catharometer. An oven is installed in order to allow the regeneration (to avoid contamination) of the column at 250°C. A pressure safety is inserted just after the detector in order to protect its wires.