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Quick Specs

  • Size:2-1/16" (52.4mm)
  • Type:Digital Stepper Motor
  • Range:100-300 °F
  • Lighting:LED
  • Instructions: Download PDF


Designed for the absolute harshest environments, the AutoMeter Extreme Environment series gauges provide the very best in waterproof sealing. Engines don’t like high water temperatures, Heat is the enemy of performance and reliability. Keep tabs on your temps with the most accurate, quickest responding water temperature gauge on the market. AutoMeter’s advanced 1/8” NPT temperature transducer is included as well as a direct plug in wiring harness for ease of installation. Preconfigured warning points change the gauge's LED illumination from white to red, allowing you to concentrate on the work at hand or taking the checkered flag.

Feature Points
  • Waterproof Design - Sealed front and rear for protection against the elements in exposed cockpits
  • 6 pin DT connector at gauge makes for a sealed connection
  • Ultra light weight construction - 70% Lighter than Pro-Comp Liquid Filled 2-5/8” gauges, 60% lighter than Ultra-Lite 2-5/8” Mechanical, 25% lighter than Spek, 10% less than Elite
  • White through-dial LED lighting with red pre-set full dial warning with solid and blink transitions
  • External momentary switch for control of brightness and peak recall
  • Stepper motor design with unique multi-scale dial derived from NASCAR tech for optimized resolution and accuracy in critical operating range
  • Preset backlight color change warning - 230ºF
  • IP69K certified
Ships With
  • Includes Sending Unit: 2252
California Residents: Prop 65 WARNING prop65 Cancer, Birth Defects and Reproductive Harm



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I know that the warning system works with the internal backlighting, but is it possible to also wire this unit to an external warning lamp? I want to add a master caution lamp to my race car.

Asked by: Jacob117
You would have to have a external light that would work with our 3246 or 3247 for example. Those are temp switches that work with external shift lights depending on the temp.
Answered by: Thomas From AutoMeter
Date published: 2023-05-19

Does this gauge have an option to control the fan? Like once it gets over a certain temp, will it turn on the fan?

Asked by: Anonymous
There are no outputs for external triggering on the EEG (Extreme Environment Series). Our Elite Series will offer this feature:
Answered by: Matt from AutoMeter
Date published: 2023-02-27

How is the gauge mounted?

Asked by: Core
I used one of the auto meter mounting cup. Fit great
Answered by: yfzrdp
Date published: 2020-03-04


Asked by: BODADDY
Thank you for your question. Unfortunately these are not compatible with a 24v system.
Answered by: Steve from AutoMeter
Date published: 2020-01-08

how long is the wiring harness for the extrem water temp gauge, and is there longer harness's for sale ?

Asked by: Iolekaa
I’m gonna say six to eight feet, can be cut or added to. I called the factory.
Answered by: yfzrdp
Date published: 2019-09-22

Would this be a good gauge for an atv?  

Asked by: Dan007
If you have a place to mount it, I would say yes. Very rugged gauge.
Answered by: yfzrdp
Date published: 2020-05-29

I have a new miller big blue with a cat diesel, it's in a dirty hot location (facing back right at the tailgate). I just found these, would they be a long term gauge?

Asked by: Dale81
Thanks for your inquiry. The 9255 is suitable for use with your Miller Big Blue.
Answered by: Jim from AutoMeter
Date published: 2019-08-02

How long is the wiring harness between gauge connector and sender connector? Can it be extended without affecting gauge operation?

Asked by: want to know
I forget how long, maybe 6 ft. it can be added to or shortened with out any effect. I checked with Auto Meter on that .
Answered by: yfzrdp
Date published: 2020-05-29
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