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Quick Specs


Watching your precise exhaust temperature can mean the difference between maximum performance and catastrophic engine damage. On high output diesel or forced induction applications, there are few gauges that are more critical. AutoMeter’s Digital Stepper Motor display combined with our high definition LED backlighting make viewing your exact exhaust temperature effortless. The included Type K thermocouple assures maximum accuracy and minimum response time. There is, quite simply, not a better measurement of your exact exhaust gas temperature available anywhere, for any price. A variety of included installation options and direct plug in harness simplify installation on any application.
Feature Points
  • Modern blue LED through-the-dial lighting provides clear visibility during nighttime use
  • The included Type K thermocouple assures maximum accuracy and minimum response time
  • AutoMeter’s race proven digital stepper motor electric instruments provide unmatched accuracy which is further increased by utilizing a self calibration sequence during power up
  • Gauge kit includes Type-K Thermocouple, wiring harness, thermocouple mounting kit, mounting hardware, and detailed instructions for installation
  • 12 and 16 volt compatible, compatible with nearly every street car or race car electrical system
Ships With
  • Includes Sending Unit: 5251
  • 3256
  • 2230
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Cobalt egt gauge stuck on 700 degrees.  Gauge still works just  doesn’t go to 0. 

Asked by: Huwenfut
Thank you for your question. This will likely require some back and forth dialogue with our Tech Support Team, so we’d recommend sending us a detailed email here:
Answered by: Natalia from AutoMeter
Date published: 2021-01-22

Hi, I bought a car with this gauge in. Can you provide me a resistence spec for the probe?? And, am I able to buy just the gauge itself if my probe tests out good?? My gauge is stuck around 400 degrees. I'd like to buy only what I need for this to work.

Asked by: Martyn706
Hi Martyn, The gauge is not sold separately. The probe and harness are part number 5251: The probe is not resistance based, it is a Type K Thermocouple. An Internet search for Type K Thermocouple specs will bring up the mV to degrees F chart you need. Thanks, Jim
Answered by: Jim from AutoMeter
Date published: 2020-05-15

I reversed the power on the light when I was hooking up the gauge, and heard a pop. Gauge works, but the light does not. I assume it is the circuit for the led. Is that replaceable?

Asked by: Gauge_Newbie44
Thank you for your question. This gauge would need to come back to us for evaluation and service. Our service form can be found at:
Answered by: Alex at AutoMeter
Date published: 2020-05-13

I noticed that the hole in the 1/8 npt bolt for the pyrometer to fit through is larger than the actual probe itself. Is there anything I can do to keep it from leaking?

Asked by: C.J.
Hi, There is a small gap between the probe and fitting to allow for heat expansion and contraction. Exhaust gas leakage through this is negligible, and will not be noticeable. Thanks, Jim
Answered by: Jim from AutoMeter
Date published: 2020-04-16

In this series of gauges are the LED lights able to be dimmed?  If so do you sell a rheostat for them or will any 12 volt one work. Thanks for the help. 

Asked by: Bowtie3t
You can use P/N: 9114 to dim any of our LED lit gauges.
Answered by: Steve from AutoMeter
Date published: 2020-06-25

Is the thermocouple available as a spare part for your pyrometer , had my unit for maybe 5 year and I am now experiencing signal problems from temp probe. The display gauge will bounce from 0 - 100f in quick succession, I expect it’s the couple. Graeme

Asked by: Graeme
Thank you for your inquiry. The thermocouple for this gauge is available as part number 5251:
Answered by: Jim from AutoMeter
Date published: 2020-04-02

Do you sell the probe only for autometer pyrometer cobalt am6144?

Asked by: Herald
Thank you for your question. The probe itself is not sold individually, it is only sold attached to the wire harness. The wire harness and probe is part #5251.
Answered by: Zach from AutoMeter
Date published: 2020-01-13

My probe has been damaged because it siezed in the holder. Can I buy just the probe?

Asked by: Jobe89
Hi Jobe, thank you for reaching out to us. Yes, the probe for the 6144 is available as model 5251.
Answered by: Matt from AutoMeter
Date published: 2020-01-13
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