10 Best Air Fuel Ratio Gauge Review of 2021

Top 5 Best Air Fuel Ratio Gauge: Editor Recommended

The 10 Best Air Fuel Ratio Gauge Reviews:

1. AEM (30-4110) UEGO Air/Fuel Ratio Gauge

Our World-famous Wideband O2 air/fuel ratio UEGO gauge features a digital LED display and sweeping LED ‘needle’ that changes colors as AFR changes from rich to lean. A 52mm (2-1/16″) gauge housing ensures that it will fit in most gauge pods and can be remotely mounted virtually anywhere.

All AEM digital gauges feature a 0-5V analog output for use with data loggers and almost any engine management system. Each gauge comes with black and silver bezels and black and white faceplates for multiple color combinations and a custom look (a black Lambda faceplate and black and white Air/Fuel Ratio faceplates).

The Bosch UEGO sensor gives the controller its speed and accuracy. The Bosch 4.9 LSU sensor used in the AEM Wideband UEGO AFR Controller Gauge has a faster light off time and draws less current than the 4.2 LSU sensor used with AEM’s 30-4100 Wideband UEGO Controller Gauge, which will be superseded to the gauge in August, 2014.

The 4.9 LSU sensor features the same fuel compatibility as the 4.2 LSU and NEVER requires free-air calibration when used with AEM’s Wideband UEGO AFR Gauge. The 4.9 LSU sensor uses a different connector than the connector used with the 4.2 LSU sensors included with the original 30-4100 gauge controller.

The sensors are not interchangeable between the two gauge controllers in any way, including changing connectors on the gauges. The Wideband O2 air/fuel ratio UEGO gauge is a must if you want to maximize your engine’s power and safety.

There are two harnesses that connect to the back of the AEM UEGO gauge. The longer harness connects to the UEGO sensor. The shorter harness contains four leads.

Highlighted Features:

  • Interchangeable black and white faceplates included for customizing gauge appearance
  • Bosch 4.9 LSU wideband sensor and weld-in bung included PN 30-4110
  • No free air sensor calibration required ever. A 2-1/16 inch gauge housing ensures that it will fit in most gauge pods and can be remotely mounted virtually anywhere
  • Interchangeable black and silver bezels included. 52mm (2-1/16”) gauge housing
  • 0-5V analog output 10-20 AFR range only

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2. Auto Meter 4379 Ultra-Lite Wide Band Air Fuel Ratio Kit

Gauge kit includes custom tuned .1 AFR Resolution Bosch LSU4.2 Sensor, 8ft. wiring harness, 304 stainless steel weld-in bung, mounting hardware, and detailed instructions for installation 0-4v data output feed for ECU, data acquisition unit, or Laptop tuning

Suitable for use with gasoline powered engines Digital segment display and LED radial bar graph display 12 and 16 volt compatible, compatible with nearly every street car or race car electrical system. The countdown at startup is annoying. Rather than instantly starting, it counts down from 15 to zero over that many seconds

When tuning an engine, accurate air/fuel ratio data is critical because running with too rich of an AFR can cause a loss of power, and running a lean AFR can result in serious engine damage. AEM’s digital Wideband AFR UEGO gauge can quickly alert you to even a .1 change in air/fuel ratio and provide enough time to shut down an engine before damage occurs.

Highlighted Features:

  • Manufacturer Auto Meter
  • Brand AUTO METER
  • Product Dimensions 3.94 x 3.94 x 3.94 inches
  • Item model number 4379
  • 50,403 in Automotive

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3. 30-0300 X-Series Wideband UEGO AFR Sensor Controller Gauge

AEM’s X-Series Wideband UEGO Air/Fuel Ratio Sensor Controller Gauges are built upon unique, patent-pending X-Digital technology that makes them the fastest responding wideband air/fuel ratio controllers in independent testing against 17 other wideband UEGO air/fuel controllers.

The X-Series Wideband UEGO AFR Sensor Controller Gauge (PN 30-0300) measures 2 1/16th-inch (52mm) in diameter and features a modern, visually striking faceplate and new seven-segment center display that is 87% larger than the 30-4110 AEM Wideband Gauge’s center display.

This creates the perception of a larger overall gauge, but in a common 52mm size for easy mounting. Its slim depth (less than one inch overall) and ultra-slim cup depth of .200-inches dramatically increases its application base and potential mounting locations.

Highlighted Features:

  • The X-Series Wideband UEGO AFR Sensor Controller Gauge (PN 30-0300) features a modern, visually striking faceplate 
  • The gauge includes a 0-5v and RS232 serial port output for feedback control and data logging, 
  • X-Digital wideband technology gives these controllers the ability to read and report values that other controllers do not,
  • Faster response time improves wideband feedback control, and can provide a safer, more powerful and accurate tune
  • When tuning an engine using wideband AFR feedback control on an inertia dyno, dead time affects the data you are looking

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4. HOTSYSTEM Universal Electronic Air

HOTSYSTEM supplies gauges in different style, such as Air/Fuel ratio, Exhaust Gas, RPM taco meter, Turbo Boost meter, Oil temperature, Oil pressure, Vacuum, Voltage and Water temperature.

Size:2in/52mm diameter Readout Blue digital LED Input Voltage: 0~1 V Display Range:20.0%~10.0% Digital Accurately: Every 0.5% Accurately of analog LED type: Every 0.5%,using BAR type to light up. Visual Angle:≤180° Material: ABS plastic

Fitment: Fit most of gasoline vehicle. Fit 2″ or 52mm Diameter Gauge Pods holder Color: Smoked Tint lens when, Color LED Display when “on” Scanning: (red-yellow-green-yellow-red) The gauge will both show the digital and analog LED. Electrics voltage display & warning function.

Easy installation: Our gauge includes electric wire with necessary mounting and installation hardware, no need other sensor, your existing oxygen sensor can fit it well.

Highlighted Features:

  • Accuracy of analog LED type: Every 0.5%,using BAR type to light up.
  • Display range: Digital type is from 20.0% to 10.0%;Analog LED type is from 20.0% to 10.0%;Both of digital type and analog LED type will show the maximum or the minimum, if the value out off the display range.
  • Warning(Red Light):At start, the voltage is lower than 11.0V,the value of AIR/FUEL is lower than 0.8 or higher than 10BAR(lower than 12 or higher than 120PSI).
  • Direct analog: The digital has 20 LED pcs, 10.0%≤Air/Fuel ratio≤12.5%,the LED lights appear green among 6pcs; 13.0%≤ratio≤17.5%, the LED lights appear yellow among 10pcs;18.0%≤ratio≤19.5%, the LED lights appear red among 

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5. ESUPPORT Car 2″ 52mm Air Fuel Ratio Gauge

Gauge May Be Mounted In 2″/52mm Dia holes Or In Auto Gauge Custom Mounted Panels .Secure Gauge With Mounting Clamps Supplied. Drill 3/8″ Dia .Holes And Install Rubber Grommets Where Pressure Or Vacuum Line Passes Through Sheet Mental Such As Firewall.

Attach Nylon Pressure Line To Fitting On Back Of Gauge Using Adaptor ,Ferrule ,And Compression nut .Route Line Through Grommets To Engine Compartment .Connect Line To Pressure port On Engine By Using 1/8″ Adaptor Ferrule And Compression Nut For Turbo And Prossure Gauge Or 1/8″ Adaptor And Fitting For Vacuum Gauge.

Start Engine And Thoroughly Check Installation For Leaks. Twist In Light Socket Assembly And Connect One Wire(Yellow) To Dash Lighting Circut Or Other 12V Power Source And The Other Wire(Black) To A Good Ground. High quality movement Make product measurements more accurate, Faster measurement, pay attention to your car in real time.

Highlighted Features:

  • Diameter: 2″/52mm.
  • Red LED illuminated needles.
  • LED super white display.
  • Air/Fuel Ratio Gauge
  • Power: DC(10-15V) 12V Professional.

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6. Black 7 Series Digital Wideband Air / Fuel Ratio AFR Gauge Kit

GlowShift’s Black 7 Color Series Digital Wideband Air/Fuel Ratio Gauge Kit is essential when tuning any performance vehicle. Installing this gauge allows you to closely monitor and tune your vehicle’s air to fuel ratio giving you multiple benefits like reduced emissions, higher fuel economy, and maximized power and engine performance.

You’ll have the ability to carefully map out your vehicle’s air to fuel ratios throughout the range of RPM and manifold pressure, resulting in maximized power output. You’ll also experience a cutting-edge look and innovative design that features an easy to read, ultra-bright blue LED digital numeric readout on a black gauge face with magnified clear lens which displays your vehicle’s air to fuel ratio from 10.0 to 20.0 AFR. The 3 Color LED Ring also featured on the gauge face indicates Lean, Rich, and Optimal Air/Fuel Mixtures.

And while this gauge is intended to match Glow Shift’s Black 7 Color Gauge Series, it does not change colors due to the digital display. Wideband air to fuel ratio gauges offer multiple benefits for high performance race cars which include maximized horsepower and added fuel economy.

The 0 to 5 volt digital output allows you to connect the gauge to virtually any data logging or engine management system to log real time data for more precise tuning. Glow Shift’s Black 7 Color Series Digital Wideband Air/Fuel Ratio Gauge Kit will add a unique look and style to the interior of your vehicle while also monitoring your exhaust system to ensure peak performance.

Highlighted Features:

  • GlowShift Black 7 Series Wideband Air/Fuel Ratio Gauge is Essential for Tuning & Mapping Out the Air to Fuel Ratios 
  • Wideband Air/Fuel Ratio Readings from 10.0 to 20.0 AFR – 2-1/16″ (52mm) Gauge with Black Dial, Clear Lens & Digital 
  • AFR Quality & Values | Rich: 10.0 ~ 12.0 AFR | Optimal: 13.0 ~ 15.0 AFR | Lean: 16.0 ~ 20.0 AFR
  • Includes 4.9 LSU Wideband Oxygen Sensor, Weld-In Bung, Control Box, 10′ Sensor Harness, 7′ Gauge to Control 
  • GlowShift Guarantee with One Year Limited Warranty & Free Lifetime Technical Support

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7. GlowShift Tinted 7 Series Digital Wideband Air

GlowShift’s Tinted 7 Series Digital Wideband Air/Fuel Ratio Gauge comes complete with everything required for installation. Along with this gauge you will also receive a Digital 12-Volt Wideband Controller with Data Logging Output, 4.9 LSU Oxygen Sensor, 13’ Sensor Wire Harness, 6’ Control Unit to Gauge Wire Harness, 5’ Power Wire Harness,

Weld-In Sensor Bung, Gauge Visor, and all mounting and installation hardware. GlowShift makes the process easy with detailed step-by-step instructions that will walk you through the entire process.

Experience a unique design that includes a magnified tinted lens, black gauge face and a powerfully bright LED display. Plus, with the stealth-like feature that is accentuated when your gauge is not active, your gauge will look incredible whether it is On or Off after being installed inside your car or truck.

GlowShift Gauges is world renowned for providing exceptionally crafted and competitively priced automotive gauges with an extensive variety of styles and options. Over the years, GlowShift’s lineup of performance gauges and gauge pods has grown exponentially to include many of the most sought after gauges in the automotive market.

Highlighted Features:

  • GlowShift Tinted 7 Series Wideband Air/Fuel Ratio Gauge is Essential for Tuning & Mapping Out the Air to Fuel Ratios
  • Wideband Air/Fuel Ratio Readings from 10.0 to 20.0 AFR – 2-1/16″ (52mm) Gauge with Black Dial, Tinted Lens 
  • AFR Quality & Values | Rich: 10.0 ~ 12.0 AFR | Optimal: 13.0 ~ 15.0 AFR | Lean: 16.0 ~ 20.0 AFR
  • Includes 4.9 LSU Wideband Oxygen Sensor, Weld-In Bung, Control Box, 10′ Sensor Harness, 7′ Gauge to Control 
  • GlowShift Guarantee with One Year Limited Warranty & Free Lifetime Technical Support

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8. GlowShift Tinted 7 Color Analog Needle Wideband Air

GlowShift’s Tinted 7 Color Analog Wideband Air/Fuel Ratio Gauge is an essential tool to use to closely monitor and fine-tune your performance vehicle’s air-to-fuel ratios from 10 ~ 20 AFR quality values. Multiple benefits of using this monitoring system include reduced emissions and higher fuel economy.

This wideband air/fuel ratio gauge allows you to carefully map out your vehicle’s air/fuel ratios through the range of RPM and manifold pressure which results in maximized power output and engine performance.

This Analog Wideband Air/Fuel Ratio Gauge features a data logging capability through use of the included GlowShift branded controller. This allows you to log real time data and further fine-tune by connecting to any data logging or engine management system. This gauge can be used on any vehicle that runs leaded, unleaded and diesel fuel.

This 2-1/16” (52mm) gauge features a black face with tinted lens that matches the Tinted 7 Color Gauge Series. The illuminated red needle utilizes stepper motor technology that allows for smooth needle movement.

By pressing the button located on the gauge face, users can select from 7 different solid colors that include blue, green, red, white, purple, yellow and teal, as well as 2 color cycle modes that utilize all of the colors.

With the included color recall feature, you won’t have to worry about setting the gauge to your preferred color every time you power your vehicle on. Connecting this gauge to the factory headlight switch source allows the gauge to dim 30% for easier monitoring when driving at night.

Highlighted Features:

  • GlowShift Tinted 7 Color Series Analog Wideband Air/Fuel Ratio Gauge is Essential for Tuning & Mapping Out the Air 
  • Wideband Air/Fuel Ratio Readings from 10 to 20 AFR – 2-1/16″ (52mm) Gauge with Black Dial, Tinted Lens 
  • 7 Solid Color Modes & 2 Color Cycle Modes Allow You to Match Your Factory Dashboard Lights or Add a Custom Style to the Interior of Your Vehicle – Colors Include Blue, Red, Green, Teal, Purple, 
  • Includes 4.9 LSU Wideband Oxygen Sensor, Weld-In Bung, Control Box, 10′ Sensor Harness, 7′ Gauge to Control 
  • GlowShift Guarantee with One Year Limited Warranty & Free Lifetime Technical Support

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9. AEM 52mm Wideband UEGO Air Fuel Ratio Sensor

X-Series Wideband UEGO AFR Controller Gauge were fastest responding wideband air/fuel ratio controllers in an independent test vs. 17 competitor wideband AFR controllers. Includes Bosch 4.9LSU wideband UEGO sensor

Factory calibrated resistor does not require free-air calibration, but technology allows for free-air calibration as sensor ages if user desires Compatible with vehicle/system voltages up to 16V. 0-5V & RS232 output for data logging and feedback control,

AEMnet (CANbus) for data logging and daisy-chaining multiple controllers up to 16 cylinders Can display AFR values in hundredths 52mm gauge diameter and slim 0.825” gauge depth

Gauge cup depth only .200” deep! Auto dimming feature User configurable display via buttons on the gauge face for changing AFR values, Lambda and O2%, and 3- or 4-digit display Black bezel and black dual faced faceplate, silver bezel/white gauge option included. Locking connectors

The X-Series Wideband UEGO AFR Sensor Controller Gauge (PN 30-0300) measures 2 1/16th-inch (52mm) in diameter, and features a modern, visually striking faceplate and new seven-segment center display that is 87% larger than the 30-4110 AEM Wideband Gauge’s center display.

This creates the perception of a larger overall gauge, but in a common 52mm size for easy mounting. Its slim depth (less than one inch overall) and ultra slim cup depth of .200-inches dramatically increases its application base and potential mounting locations.

Highlighted Features:

  • X-Series Wideband UEGO AFR Controller Gauge were fastest responding wideband air/fuel ratio controllers
  • Black bezel and black dual faced faceplate, silver bezel/white gauge option included.
  • Display Lambda values from .55 to 2.00
  • Factory calibrated resistor does not require free-air calibration, but technology allows for free-air calibration as sensor 
  • Includes Bosch 4.9LSU wideband UEGO sensor. 52mm gauge diameter and slim 0.825” gauge depth.

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10. Equus 8366 2″ Air/Fuel Ratio Gauge

This air/ fuel gauge features a dual display that offers independent or dual left/right bank vs. inline readings. It includes electrical connectors for installation on most vehicles – foreign and domestic. Durable lightweight case and aluminum bezel ensures lasting accuracy and performance.

Rear twist-on ring mount design makes installation and mounting simple. More details of the 8000 Series Performance Gauges are available in the above images. Depending on the engine; the type of O2 sensors; the installed location of the O2 sensors; and whether the engine is injected or carbureted.

Highlighted Features:

  • Connect to oxygen sensor and determine whether the engine is running rich or lean for maximum performance efficiency
  • Dual display offers independent or dual left/right bank vs. inline readings
  • Color LEDs provide a quick visual display of air/fuel ratio
  • Aluminum bezel is lightweight and optimizes appearance
  • Rear twist-on ring mount design makes mounting simple

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Buying Guide: What to Consider When Select Best Air Fuel Ratio Gauge

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We’re trustworthy that you likely have far more questions than just these concerning Air Fuel Ratio Gauge Reviews, and the only real way to satisfy your need for knowledge is to get facts from as many reputable online sources as you possibly can.

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