Carbon Sensors / Oxygen Sensors

3rd generation – delivers precision and repeatability in a variety of controlled atmosphere heat treating processes.


Totally interchangeable with other manufacturers’ probes and instrumentation.


Return on Investment:
Low priced with a full one year warranty on both the original and the rebuilt probe.


Cermet coating:
Impenetrable layer extends probe sheath life in the harshest applications and reduces the  catalytic effect between nickel and methane.


Optimum burnout efficiency:
Patented sheath/electrode design facilitates probe burnout, promoting longer life.


Rebuild Policy:
SSi’s Gold Probe can be rebuilt one time after the initial warranty period has expired for 50% of the list price. Rebuilt warranty is an additional 12 months.

%Carbon:0.01% to 1.6%
Temperature:1100 to 2000°F (593.3 to 1093.3°C)
Mounting1" NPT
Impedance:Less than 10k ohms

Original Gold Probe

The GOLDPROBE is a zirconia oxygen sensor used for atmosphere measurements which include non-oxidizing, reducing, neutral and carburizing processes.

ModelOverall LengthInsertion LengthType KType SType RType NNo T/C
GP13320.8" (528mm)14.2" (360mm)Not available uncoated
GP20527.2" (690mm)20.6" (522mm)16019001601800160110016016001601000
GP27734.3" (871mm)27.7" (703mm)16029001602800160210016026001602000
GP33039.5" (1003mm)32.9" (835mm)16049001604800160410016046001604000
GP37343.4" (1102mm)36.8" (934mm)16099001609800160910016096001609000

CeraGold Probe

Designed for HIGH temperature and HIGH carbon applications.

CeraGold Probes include a cermet coating to extend probe sheath life and to reduce the catalysis effect with methane that is present with other probe alloy sheaths. This design feature, along with the unique anode contact configuration, is the subject of a recently awarded U.S. patent.

Heat treaters operating equipment at elevated temperatures ( > 1700°F ) and carbon potential ( > 1.20% C ) will experience the most significant gain in probe life. The cermet sheath treatment creates a tenacious, impenetrable layer to protect all exposed surfaces of the probe sheath from the carburizing atmosphere. This reduces the amount of nickel exposed at the surface, reduces soot formation, and virtually eliminates high temperature corrosion (green rot).

CERAGOLD’s “on the fly” burn off capability eliminates nagging probe accuracy and response problems. CeraGold is designed with a 1/2″ pipe sheath, not 3/4″ as with other probes. The 1/2″ size requires much lower volumes of burnoff air to reach the probe electrode tip. This feature greatly contributes to rapid, efficient probe burnoff, and hence to longer term probe accuracy and process consistency.

Patented design delivers accuracy and repeatability for Carbon potential, dew point, and oxygen. State-of-the-art probe design features high velocity burn-out. Engineered to be rebuilt at 50% of the original cost.

ModelOverall LengthInsertion LengthType KType SType RType NNo T/C
GP13320.8" (528mm)14.2" (360mm)11139001113800111310011136001113000
GP20527.2" (690mm)20.6" (522mm)16119001611800161110016116001611000
GP27734.3" (871mm)27.7" (703mm)16129001612800161210016126001612000
GP33039.5" (1003mm)32.9" (835mm)16149001614800161410016146001614000
GP37343.4" (1102mm)36.8" (934mm)16199001619800161910016196001619000

Nitro Gold Probe

Designed with the traditional Gold Probe features, Nitro Probes deliver precision and repeatability in controlled atmospheres with a focus on lower temperatures which would be typically found in ferritic nitrocarburizing applications. Nitro Probes are ideal for measurement of carbon potential above temperatures of 950 F (510 C) and pre- and post-oxidation processes at lower temperatures.

ModelOverall LengthInsertion LengthType KType SType RType NNo T/C
GP13320.8" (528mm)14.2" (360mm)Not available uncoated
GP20527.2" (690mm)20.6" (522mm)10019001001800100110010016001001000
GP27734.3" (871mm)27.7" (703mm)10029001002800100210010026001002000
GP33039.5" (1003mm)32.9" (835mm)10049001004800100410010046001004000
GP37343.4" (1102mm)36.8" (934mm)10099001009800100910010096001009000


XL Gold Probe

ModelOverall LengthInsertion LengthType KType SType RType NNo T/C
GP37343.4" (1102mm)36.8" (934mm)19099001909800190910019096001909000
GP42049.8" (1264mm)41.1" (1051mm)19099421909842190914219096421909042
GP48055.7" (1415mm)47.3" (1202mm)19099481909848190914819096481909048

Bazooka Probe

Designed for HIGH temperature and HIGH carbon applications.

Super Systems, Inc. offers their most recent innovation with respect to measuring the atmosphere output from an endothermic generator. The BAZOOKA fits through the side of the generator, features its own integral sample well, and fits easily into a standard 1 1/4″ hole.  Used on rotary and muffle furnaces. Installed in combustion chamber. Integral sample well. Operates at 1500 – 1600°F (816 – 871°C) for optimum life.

ModelOverall LengthInsertion LengthType KType SType RType NNo T/C
GP13322.8" (578mm)16.1" (410mm)17139001713800171310017136001713000
GP20529.1" (740mm)22.5" (572mm)17119001711800171110017116001711000
GP27736.3" (921mm)29.6" (753mm)17129001712800171210017126001712000

HP2000 Self-Heated Gold Probe

Why an HP2000 self-heated oxygen sensor?

There are certain applications where an in situ oxygen probe is impractical. For those applications Super Systems, Inc. recommends the HP2000 self-heated oxygen probe. This system supplies the temperature required to make an oxygen probe function. For some applications, such as a multi-tube generator or a rotary retort furnace, this probe will allow you to extract a continuous sample of the atmosphere stream and pass it by a standard oxygen probe. Applications:

  • Rotary Furnaces Sample line extended into furnace beyond quench chute
  • Opposite-end from atmosphere introduction
  • Adequate filter system
  • Conservative addition of enriching gas
  • Modular endothermic generator
  • Allow for condensation drip
  • Fixed sample lines
  • Low temperature applications
  • Nitrogen-based low temperature, miscellaneous protective atmospheres
  • %Oxygen in residual combustion gases.
  • Sintering/Muffle furnaces
  • No need for high temperature probes

Redundant Probe System

Probe redundancy for load assurance and an alternate in-situ reading of the furnace atmosphere.  Function: The Model 9120 RPS reads the signal from two oxygen probes located in the same furnace, automatically switching the output from the Model 9120 RPS to the probe with the highest millivolt output. Find out more.

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    Product LineUser ManualDatasheetWiringOther
    Gold ProbePDF | Online Gold Probes Datasheet
    Bazooka ProbePDF | Online Gold Probes Datasheet
    Ceragold ProbeGold Probes DatasheetProduct Technical Brief
    Redundant Probe System (9120)PDF | OnlineRPS Datasheet
    Redundant Probe System (9120) w/ Touch ScreenPDF | Online RPS Datasheet
    HP15-VR Self-Heated Oxygen Measurement and Control SystemPDF | Online
    HP15 Self-Heated Oxygen Measurement and Control SystemPDF | Online
    HP2000PDF | Online
    HP2000 (Previous Generation)PDFStandard Systems Datasheet
    General InfoZirconia Sensor Theory
    Carbon Sensor Troubleshooting
    Do it Right Advisory: Atmosphere Probes
    Do it Right: Maximize Product Quality