AP1 In-Situ Carbon Probe

Brand: Eurotherm
Does not ship to United States

The AP1 In-Situ Carbon probe, one of the Series AP probes, is a direct and continuous carbon potential probe.

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 a high temperature special alloy with a flow through tip design to minimize soot collection. Internal connections are protected by a high quality connecting head.

External connections are made with a quick disconnect 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.
  • High temperature carburizing heat treating
  • Carbonitriding
  • Endothermic gas generators
  • High accuracy and repeatability
  • High efficiency, low maintenance
  • Rapid response
  • Compatible with all carbon controllers
  • Reference air supply and burnoff enclosures




  • ± 0.05 % Carbon in Normal Operating Range

Input Impedance

  • 8 megaohms or Higher

Mounting Position

  • Horizontal
  • Vertical

Operating Temperature

  • Horizontal Mount: Approximately 760° to 960° C (1,400° to 1,760° F)
  • Vertical Mount: Approximately 760° to 1,100° C (1,400° to 2,012° F)


  • 1-1.20 Vdc

Response Time

  • < 1 second

Sensor, Probe Type

  • K Thermocouple
  • R Thermocouple
  • S Thermocouple
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