The Series AP In-Situ Carbon Sensor is a direct and continuous carbon potential sensor. It provides measurement accuracy of .05% of carbon over the temperature range of the sensor. Its unique patented design features a cylinder of special zirconium oxide formulation, welded into the end of an alumina tube by means of an eutectic welding process. The resultant homogenous structure provides the most rugged element design. The superstructure is of high temperature special alloy with a flow through tip design which minimizes soot collection. Internal connections are protected by a high quality connecting head. External connections are made with a quick disconnect four pin plug.

The probe can measure very low oxygen partial pressures with extreme accuracy and repeatability. It will control furnace atmospheres and generator gas supplies over the full range of carburizing hardening applications.

The furnace can be raised to operating conditions more rapidly and better control maintained after loading, resulting in economical energy savings. The carburizing gas supply is used more efficiently, resulting in increased savings. Furnace burnout of carbon deposits is either reduced or eliminated. Leakage of furnace seals or firing tubes is easily detected to make repairs and improve furnace efficiency.

The Series AP Probe does not require frequent maintenance and cleaning. When cool, it can be cleaned with a soft brush. No calibration is required. The only part subject to wear is the outer electrode which can be renewed at the factory. A special purge fitting allows soot burn-off in the furnace.