What is a POX Thermocouple Probe?
A POX Probe, sometimes know as a CO reactor thermocouple, is a special design of thermocouple sensor found in partial oxidation plants. Partial Oxidation Plants are used to form hydrogen, carbon monoxide, carbon dioxide or Synthesis Gas (syngas). A typical assembly consists of a ceramic sheath at the hot end of the probe. Followed by an Inconel coating for further temperature resistance. A forged flange, which is them fitted and welded to the sheath. Finally an RTJ is used to press the flange and the sheath together, forming a pressure seal. This assembly can work effectively at temperatures with a maximum of 1500°C.