
Choosing the right air fuel ratio gauge is not an easy task and if not researched properly, you may even end up getting a bad quality air fuel ratio gauge.
To help you choose the right one, I’ve analyzed over 835 customer reviews and have made a list of 31 best possible options.










Best air fuel ratio gauge in 2022 [Top Picks]
My top picks when it comes to air fuel ratio gauge are: AEM (30-4110) UEGO Air/Fuel Ratio Gauge and the GlowShift Tinted 7 Color Narrowband Air/Fuel Ratio AFR Gauge - Lean, Optimal & Rich Readings - Black Dial - Smoked Lens - 2-1/16" 52mm. However, the right one depends a lot on the use-case. So it’s not necessary that my top picks are best suited for your use-case. That’s why I’ve also included 29 other decent options.






Features
- 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
- 0-5V analog output 10-20 AFR range only
- Interchangeable black and white faceplates included for customizing gauge appearance
- Interchangeable black and silver bezels included. 52mm (2-1/16”) gauge housing
Manufacturer: AEM
Brand: AEM
Model: 30-4110
Item Weight: 14.1 ounces
Product Dimensions: 2.17 x 2.76 x 2.17 inches
Country of Origin: USA
Item model number: 30-4110
Is Discontinued By Manufacturer: No
Manufacturer Part Number: 30-4110
OEM Part Number: 30-4110






Features
- Narrowband Air/Fuel Ratio Readings from Lean, Optimal & Rich Mixtures - 2-1/16" (52mm) Gauge with Black Dial, Tinted Lens & Illuminated Red Needle
- GlowShift Guarantee with One Year Limited Warranty & Free Lifetime Technical Support
- Includes 2' Power Harness with 6' Sensor Lead Wire, Gauge Visor, Mounting Hardware & Installation Instructions
- 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, White & Yellow - Connecting the Dimmer Wire to the Headlight Switch Reduces Brightness of the Gauge by 30% When the Headlights are On
- GlowShift Tinted 7 Color Series Narrowband Air/Fuel Ratio Gauge Monitors & Displays Your Engine's Air to Fuel Mixture by Reading the Voltage Output of a Narrowband Oxygen Sensor






Features
- Oxygen SensorOxygen Sensor OEM:0258006028, Working Voltage: DC12V, Spiral: M18*1.5, Use Wrench: 22mm, Output Voltage: Maximum value ≥900mv/ minimum value ≤50mv.
- [After-Sale Guarantee]Includes 1x Air Fuel AFR Gauge, 1x Narrowband Oxygen Sensor, 1x English Manual. Please contact us if you are dissatisfied with our products, the response will be taken in 24 hours and provide proper solutions.
- Range 2-1/16" (52mm) gauge with black dial. Air/Fuel Ratio readings from 10.00 to 20.00 AFR.
- ApplicabilityAir Fuel Ratio gauge compatible for 12 volt car. High sensitivity and easy operation.
- FunctionNumbers clearly show, LED backlit for easy reading in the darkness.




Features
- 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.
- 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).
- 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.
- Accuracy of analog LED type:Every 0.5%,using BAR type to light up.
- 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 4pcs.
Manufacturer: HOTSYSTEM
Brand: HOTSYSTEM
Item Weight: 7.2 ounces
Package Dimensions: 7 x 5.5 x 3.2 inches
Item model number: 5864171461
Is Discontinued By Manufacturer: No
Manufacturer Part Number: HSC017032






Features
- 100% SATISFACTION SERVICEIf you have any questions or dissatisfaction, please email us and we will help you solve it perfectly - 24 Months Warranty & 24 Hours Service.
- INSTALLATIONThanks to the 52mm housing of the wideband gauge, you can install it almost wherever feasible. Plug and play, very convenient. In order to help you understand the accessories and installation details, we have provided an installation instruction in the package.
- WIDELY COMPATIBILITYThe 52 mm (2-1/16 inch) gauge housing ensures that it fits most instrument pods and can be installed remotely almost anywhere. Our digital wideband gauge have 0-5V analog output, which can be used with data loggers and almost all engine management systems. Confirm compatibility by model number rather than brand or image. (PN: 30-4110)
- AIR/FUEL RATIO UEGO GAUGEOur wideband O2 AFR gauge has a digital LED display and LED "needle" that changes color as the AFR changes from rich to thin; Each gauge is equipped with black and silver bezels and black and white faceplates for multiple color combinations and customized appearance.
- PREMIUM QUALITYAccurate A/F ratio data is crucial when adjusting the engine. The 4.9 LSU sensor provides speed and accuracy for the controller, it can react quickly even for every 0.1 air-fuel ratio change, allowing you more time to respond and protect your engine safety. At the same time, it never requires free-air calibration when used with our wideband O2 UEGO AFR gauge.




Features
- Positive lock connectors for all connections
- includes the LM-2, Bosch LSU 4.9, 8 ft sensor cable, cigarette-lighter power, USB cable, weld-in bung and plug, and quick-start guide.
- Patented “Direct Digital” Wideband Technology
- Wideband O2 sensor (Bosch LSU 4.9) is compatible with most fuel types (leaded, unleaded, diesel, methanol, E85, etc)
Manufacturer: Innovative Motorsports
Brand: Innovate Motorsports
Item Weight: 5.3 ounces
Product Dimensions: 7.09 x 1.18 x 3.54 inches
Country of Origin: USA
Item model number: 3837
Is Discontinued By Manufacturer: No
Exterior: Textured
Manufacturer Part Number: 3837
OEM Part Number: 3837
Voltage: 12 Volts


Features
- 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
- 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
- Suitable for use with gasoline powered engines
- 0-4v data output feed for ECU, data acquisition unit, or Laptop tuning
Manufacturer: Auto Meter
Brand: Auto Meter
Model: AutoMeter
Item Weight: 1.08 pounds
Product Dimensions: 3.94 x 3.94 x 3.94 inches
Item model number: 4379
Is Discontinued By Manufacturer: No
Manufacturer Part Number: 4379
OEM Part Number: 4379
Bulb Type: Digital LED






Features
- 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, White & Yellow - Connecting the Dimmer Wire to the Headlight Switch Reduces Brightness of the Gauge by 30% When the Headlights are On
- GlowShift Guarantee with One Year Limited Warranty & Free Lifetime Technical Support
- Includes 4.9 LSU Wideband Oxygen Sensor, Weld-In Bung, Control Box, 10' Sensor Harness, 7' Gauge to Control Box Harness, 5' Power Harness, 3' Data Logging Wire, Gauge Visor, Mounting Hardware & Installation Instructions
- Gasoline Wideband Air/Fuel Ratio Readings from 10.00 to 20.00 AFR - E85 Wideband Air/Fuel Ratio Readings from 6.00 to 12.00 AFR- 2-1/16" (52mm) Gauge with Black Dial, Clear Lens & 7 Color Digital Display
- GlowShift Black 7 Color Series Digital Wideband Air/Fuel Ratio Gauge is Essential for Tuning & Mapping Out the Air to Fuel Ratios of Your Gasoline or E85 FlexFuel Performance Vehicle






Features
- Includes 4.9 LSU Wideband Oxygen Sensor, Weld-In Bung, Control Box, 10' Sensor Harness, 7' Gauge to Control Box Harness, 5' Power Harness, 3' Data Logging Wire, Gauge Visor, Mounting Hardware & Installation Instructions
- Gasoline Wideband Air/Fuel Ratio Readings from 10.00 to 20.00 AFR - E85 Wideband Air/Fuel Ratio Readings from 6.00 to 12.00 AFR- 2-1/16" (52mm) Gauge with Black Dial, Tinted Lens & 7 Color Digital Display
- GlowShift Guarantee with One Year Limited Warranty & Free Lifetime Technical Support
- GlowShift Tinted 7 Color Series Digital Wideband Air/Fuel Ratio Gauge is Essential for Tuning & Mapping Out the Air to Fuel Ratios of Your Gasoline or E85 FlexFuel Performance Vehicle
- 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, White & Yellow - Connecting the Dimmer Wire to the Headlight Switch Reduces Brightness of the Gauge by 30% When the Headlights are On






Features
- [INSTALL] - Thanks to its 52mm housing, the versatile gauge will fit into the majority of gauge pods. The gauge also features interchangeable faceplates and bezels, making it simple to achieve the ideal look for your car. To help you get started, the device comes with everything you’ll need for a hassle-free installation.
- [FUNCTION] - Accurate AFR data is critical when tuning an engine. Using a wideband air/fuel controller during the tuning process allows you to monitor AFR and adjust tuning parameters to optimize them for maximum power and efficiency.
- [WARRANTY] - If there is any problem with the product within 3 years after purchasing the product, you can always contact us for replacement or refund, high-quality after-sales guarantee.
- [HIGH QUALITY] - Every gauge features a 0-5V analog output, compatible with data loggers and practically any engine management system. In use, it’s highly responsive and accurate, thanks to a UEGO sensor housed inside.
- [AIR/FUEL RATIO GAUGE] - UEGO Air/Fuel Ratio Gauge is a broadband UEGO Air/Fuel Ratio Controller (AFR) and instrumentation in one. It combines precision, speed, and control with an easy-to-read digital LED display and LED "pointers" that change colors as the AFR changes from rich to thin.






Features
- CUSTOMER SERVICE: We have professional customer service team support. If you have any questions about the product before and after purchase, you can contact us at any time.
- AIR/FUEL RATIO GAUGE: Our German chip 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.
- INSTALL: A 52mm (2-1/16") gauge housing ensures that it will fit in most gauge pods and can be remotely mounted virtually anywhere.
- CUSTOM LOOK: 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).
- HIGH QUALITY: All UEGO gauge digital gauges feature a 0-5v analog output for use with data loggers and almost any engine management system.


Features
- 12 and 16 volt compatible, compatible with nearly every street car or race car electrical system
- 0-4v data output feed for ECU, data acquisition unit, or Laptop tuning
- Digital segment display and LED radial bar graph display
- Suitable for use with gasoline powered engines
- 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
Manufacturer: Auto Meter
Brand: Auto Meter
Model: 2-1/16 W/B,A/F STRT/
Item Weight: 1.39 pounds
Country of Origin: USA
Item model number: 3379
Is Discontinued By Manufacturer: No
Manufacturer Part Number: 3379
OEM Part Number: 3379
Bulb Type: Digital LED






Features
- 2 1/16 Inches (52mm) black face gauge, One Year Limited Warranty.
- Note: They are only accurate at sea level. IF you have any product or installation issue,please contact us, we will offer a good solution within 24hours.
- Display Feature: An pointer gauge with an illuminated red needle and blue LED display,7 Solid Color Settings for easier night driving.
- Easy Installation: Comes with 1.94ft Power Wire and installation instructions,make the install process quick and easy.
- Air/Fuel Ratio Gauge Monitoring car's air/fuel ratio lean-optimal-rich(from 10.0 to 20.0),so you can change air to fuel ratio to maximized power and engine performance, reduced emissions, and higher fuel economy.
Manufacturer: H24-C01532A1-2
Brand: HOTSYSTEM
Item Weight: 6.1 ounces
Package Dimensions: 6.05 x 4.4 x 3.05 inches
Manufacturer Part Number: H24-C01532A1-2





Features
- AEMs 30-0306 X-Series -30in/Hg~35PSI / -1~2.5BAR Digital Boost Display gauge combines incredible looks, increased readability and a multitude of new, easy-to-use features!
- Slim 0.825 overall gauge depth and 0.200 cup depth mount them virtually anywhere! Black faceplates and bezels included.
- 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.
- This AEM 3 gauge kit is a popular combo Compatible with commonly used gauges and Compatible with. Our official MAPerformance lanyard included as a special bonus!
- AEMs 30-0301 X-Series 100 PSI/7 BAR Digital Oil/Fuel Pressure gauge combines incredible looks, increased readability and a multitude of new, easy-to-use features!






Features
- Includes Bosch 4.9LSU wideband UEGO sensor. 52mm gauge diameter and slim 0.825” gauge depth.
- 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 ages if user desires.
- Black bezel and black dual faced faceplate, silver bezel/white gauge option included.
- 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. White bezel kit included.
Manufacturer: AEM
Brand: AEM
Item Weight: 1.5 pounds
Product Dimensions: 5 x 5 x 6 inches
Manufacturer Part Number: 30-0300 + 30-0300-ACC
OEM Part Number: 30-0300 + 30-0300-ACC






Features
- Includes (2) 4.9 LSU Wideband Oxygen Sensors, (2) Stainless Steel Weld-In Bungs, (2) Mild Steel Weld-In Bungs, (2) Control Boxes, (2) 10' Sensor Harness, 7' Gauge to Control Box & 5' Power Harness Splitter, (2) 3' Data Logging Wires, Gauge Visor, Mounting Hardware & Installation Instructions
- 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, White & Yellow - Connecting the Dimmer Wire to the Headlight Switch Reduces Brightness of the Gauge by 30% When the Headlights are On
- GlowShift Black 7 Color Series Dual Wideband Air/Fuel Ratio Gauge is Essential for Tuning & Mapping Out the Air to Fuel Ratios of the Left & Right Banks of Your Performance Vehicle's Engine
- Gasoline Wideband Air/Fuel Ratio Readings from 10.00 to 20.00 AFR - E85 Wideband Air/Fuel Ratio Readings from 6.00 to 12.00 AFR- 2-1/16" (52mm) Gauge with Black Dial, Clear Lens & (2) 7 Color Digital Displays
- GlowShift Guarantee with One Year Limited Warranty & Free Lifetime Technical Support





Features
- Set Includes: AEM Wideband UEGO Air/Fuel Ratio Gauge 30-4110, AEM Boost Display Gauge (-30-35PSI) 30-4406, MAP Lanyard.
- This gauge is easy to read, highly accurate, and controls its data by a digital LED display and LED needle that will change colors as the ratios change from rich to lean.
- 2 popular AEM gauges in a convenient combo set.
- All gauges are brand new, complete in box.
- Complete stand alone gauges.
Manufacturer: AEM Electronic Inc.
Brand: AEM
Item Weight: 2.38 pounds
Product Dimensions: 7 x 7 x 12 inches
Is Discontinued By Manufacturer: No
Manufacturer Part Number: 30-4110+30-4406+M-LANYARD
OEM Part Number: 30-4110+30-4406+M-LANYARD






Features
- Wideband Air/Fuel Ratio Readings from 10 to 20 AFR - 2-1/16" (52mm) Gauge with Black Dial, Tinted Lens & Illuminated Red Needle
- Includes 4.9 LSU Wideband Oxygen Sensor, Weld-In Bung, Control Box, 10' Sensor Harness, 7' Gauge to Control Box Harness, 5' Power Harness, 3' Data Logging Wire, Gauge Visor, Mounting Hardware & Installation Instructions
- GlowShift Guarantee with One Year Limited Warranty & Free Lifetime Technical Support
- GlowShift Tinted 7 Color Series Analog Wideband Air/Fuel Ratio Gauge is Essential for Tuning & Mapping Out the Air to Fuel Ratios of Your Performance Vehicle
- 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, White & Yellow - Connecting the Dimmer Wire to the Headlight Switch Reduces Brightness of the Gauge by 30% When the Headlights are On






Features
- GlowShift Guarantee with One Year Limited Warranty & Free Lifetime Technical Support
- GlowShift Elite 10 Color Series Wideband Air/Fuel Ratio Gauge is Essential for Tuning & Mapping Out the Air to Fuel Ratios of Your Performance Vehicle
- 10 Solid Color Modes & 2 Color Cycle Modes - Peak Recall Ability - Programmable High & Low Warning Notifications with Audible or Visual Alerts
- Includes 4.9 LSU Wideband Oxygen Sensor, Weld-In Bung, Control Box, 10' Sensor Harness, 7' Gauge to Control Box Harness, 5' Power Harness, 3' Data Logging Wire, Dashboard Pod, Gauge Visor, Mounting Hardware & Installation Instructions
- Wideband Air/Fuel Ratio Readings from 10 to 20 AFR - 2-1/16" (52mm) Gauge with Black Dial, Tinted Lens & Illuminated Red Needle






Features
- 4 BAR map sensor, pressure range -29 inHG to 43.5 PSI (-1 to 3 BAR)
- Programmable waste gate reference pressure threshold
- Programmable solenoid duty cycle with separate gain control function
- No PC required for configuration and use (Required for data logging)
- User programmable boost cut safety using Air/Fuel and Pressure references
- Programmable shift light & OLED user configurable display
Manufacturer: Innovate Motorsports
Brand: Innovate Motorsports
Model: 3882
Item Weight: 1.1 pounds
Product Dimensions: 3 x 3 x 3 inches
Item model number: 3882
Is Discontinued By Manufacturer: No
Manufacturer Part Number: 3882
OEM Part Number: Universal






Features
- Quick-Glance & Easy to Read Digital Display - 10 Solid Color Modes & 2 Color Cycle Modes - Self-Calibration at Startup Ensures that the Gauge is Performing Optimally
- GlowShift 10 Color Digital Series Wideband Air/Fuel Ratio Gauge is Essential for Tuning & Mapping Out the Air to Fuel Ratios of Your Performance Vehicle
- Wideband Air/Fuel Ratio Readings from 10.00 to 20.00 AFR - 2-1/16" (52mm) Gauge with Digital Display & Tinted Lens
- Includes 4.9 LSU Wideband Oxygen Sensor, Weld-In Bung, Control Box, 10' Sensor Harness, 7' Gauge to Control Box Harness, 5' Power Harness, 3' Data Logging Wire, Gauge Visor, Mounting Hardware & Installation Instructions
- GlowShift Guarantee with One Year Limited Warranty & Free Lifetime Technical Support






Features
- Diameter: 2"/52mm.
- Red LED illuminated needles.
- Power: DC(10-15V) 12V Professional.
- Air/Fuel Ratio Gauge
- LED super white display.
Manufacturer: ESUPPORT
Brand: ESUPPORT
Item Weight: 0.81 ounces
Package Dimensions: 6.3 x 4.02 x 1.3 inches
Item model number: 5864172126
Is Discontinued By Manufacturer: No
Manufacturer Part Number: CXCG11






Features
- FunctionLCD Color Screen, LED display for easy reading in the darkness.
- Range 2-1/16" (52mm) gauge with black dial. Air/Fuel Ratio readings from 10.00 to 20.00 AFR.
- Oxygen SensorOxygen Sensor OEM:0258006028, Working Voltage: DC12V, Spiral: M18*1.5, Use Wrench: 22mm, Output Voltage: Maximum value ≥900mv/ minimum value ≤50mv.
- [After-Sale Guarantee]Includes 1x Air Fuel AFR Gauge, 1x Narrowband Oxygen Sensor, 1x English Manual. Please contact us if you are dissatisfied with our products, the response will be taken in 24 hours and provide proper solutions.
- ApplicabilityAir Fuel Ratio gauge compatible for 12 volt car. High sensitivity and easy operation.


Features
- Compatible with factory narrowband O2 sensors (0-1V)
- Features LED radial bar graph display (gauge does not have provision for backlight)
- Will not work with wideband O2 sensors (0-5V) - please check your specific application before purchase
- May require model 2244 if the vehicle does not have a factory narrowband primary O2 sensor
Manufacturer: Auto Meter
Brand: Auto Meter
Item Weight: 7.1 ounces
Product Dimensions: 0.8 x 0.6 x 0.5 inches
Country of Origin: USA
Item model number: 4375
Is Discontinued By Manufacturer: No
Manufacturer Part Number: 4375
OEM Part Number: 4375
Bulb Type: LED Segments


Features
- Gauge kit includes custom tuned .1 AFR Resolution Bosch LSU4.2 Sensor, 8ft. wiring harness, 304 stainless steel weld-in bung, bulb and socket assembly, red and green bulb covers, mounting hardware, and detailed instructions for installation
- Auto Meter’s race proven digital stepper motor electric instruments provide unmatched accuracy which is further increased by utilizing a self calibration sequence during power up
- Display range of 8:1 to 18:1
- Suitable for use with gasoline powered engines
- Traditional incandescent lighting illuminates around the perimeter of the dial
Manufacturer: Auto Meter
Brand: Auto Meter
Item Weight: 1.39 pounds
Product Dimensions: 5 x 5 x 5 inches
Item model number: 3370
Is Discontinued By Manufacturer: No
Manufacturer Part Number: 3370
OEM Part Number: 3370
Bulb Type: Incandescent




Features
- Monitor left and right exhaust banks on one single meter. Perfect for V8's
- 4 fully-differential analog inputs, 2 configurable linear analog outputs
- Wideband O2 Compatible with several fuel types -Leaded, Unleaded, Diesel, E85 & more
- Datalog up to 32 channels with optional accessories. Built-in RPM converter-direct frequency or with optional inductive clamp
- User configurable display, AFR or Lambda. OBD-II Scan tool- read/clear DTCs and log up to 16 channels of CAN OBD-II Data
Manufacturer: Innovate Motorsports
Brand: Innovate Motorsports
Model: 3894
Item Weight: 3.08 pounds
Product Dimensions: 13.39 x 3.54 x 9.45 inches
Country of Origin: USA
Item model number: 3894
Manufacturer Part Number: 3894
OEM Part Number: 3894






Features
- Package Include : 1x UEGO Gauge Assembly , 1x UEGO Sensor Harness , 1x O2 Sensor Bung, 1x Installation Instruction, 4x Butt Connectors, 1x 4 Lead Harness, 1x Silver Bezel, 1x White AFR Faceplate, 4x Plastic cable tie , 1x Tie up.
- Feature : There are interchangeable black and white panels, you can customize the appearance of the dashboard according to your own preferences.
- Easy to Install : Plug and Play , The 52 mm housing can be installed wherever you want.
- Function : 0-5V analog output . When tuning the engine, accurate AFR data is critical. Through monitoring, this instrument displays the real-time and accurate air-fuel ratio on the instrument through color and LED display.
- Warranty : For any reason, if you are not satisfied with your purchase, pls contact us directly. We offer a Half-year warranty , 100% satisfaction guarantee.




Features
- The best value in wideband gauges
- Anti-Glare lens
- Pre-assembled harness
Manufacturer: WB WIDEBAND
Brand: WB WIDEBAND
Item Weight: 6.4 ounces
Package Dimensions: 8 x 4 x 4 inches
Country of Origin: USA
Manufacturer Part Number: WB_D2_BR






Features
- Faster response time improves wideband feedback control, and can provide a safer, more powerful and accurate tune
- The gauge includes a 0-5v and RS232 Serial Port output for feedback control and data logging, and an AEMnet (CANbus) output for data logging
- When tuning an engine using wideband AFR feedback control on an inertia dyno, dead time affects the data you are looking at because it is reported in a different operating location than when it actually occurred
- X-Digital wideband technology gives these controllers the ability to read and report values that other controllers do not, which can deliver more optimized engine tuning and a safer overall operating condition
- The X-Series wideband UEGO AFR sensor controller gauge (PN 30-0300) features a modern, visually striking faceplate and new seven-segment, center display that is 87% larger than the 30-4110 AEM
Manufacturer: AEM
Brand: AEM
Model: 30-0300
Item Weight: 1.43 pounds
Country of Origin: USA
Item model number: 30-0300
Is Discontinued By Manufacturer: No
Manufacturer Part Number: 30-0300
OEM Part Number: 30-0300





Features
- AEMs 30-0306 X-Series -30in/Hg~35PSI / -1~2.5BAR Digital Boost Display gauge combines incredible looks, increased readability and a multitude of new, easy-to-use features!
- This AEM 2 gauge kit is a popular combo for commonly used gauges and applications. Our official MAPerformance lanyard included as a special bonus!
- 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.
- Slim 0.825 overall gauge depth and 0.200 cup depth mount them virtually anywhere! Black faceplates and bezels included.
- 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


Features
- Two configurable linear 0-5v analog outputs
- Ability to calibrate O² sensor for maximum accuracy
- Complete kit with weld on bung, programing cable, sensor cable, and manual
- Patented DirectDigital Wideband Technology
Manufacturer: Innovative Motorsports
Brand: Innovate Motorsports
Item Weight: 4.9 ounces
Product Dimensions: 20.47 x 1.57 x 20.47 inches
Country of Origin: USA
Item model number: 3796
Manufacturer Part Number: 3796
OEM Part Number: 3796
Best air fuel ratio gauge Brands
Based on my research, here are the most reputed air fuel ratio gauge brands/sellers
- AEM
- GlowShift
- ARTILAURA
- HOTSYSTEM
- FHRHRY
- Innovate Motorsports
- AUTO METER
- Gelessy
- CNPAPC
- ESUPPORT
- Wztepeng
- WB WIDEBAND
Shoppers Guide
Like said above, if not researched properly you may end up purchasing a bad quality air fuel ratio gauge, to make sure that you’re not spending money on the wrong item, I’m adding this short buyer’s guide to assist you.
1. Buy only if you need
With the increase in eCommerce websites, purchasing anything is just a click away. That’s why a lot of people end up purchasing stuff they don't need. One way to manage this is: add the item to your cart, wait for 7-8 days before ordering it. Look at your cart after 7-8 days, if you still feel like ordering it then order it.
2. Your requirements vs Product offering
There’s no point in purchasing a air fuel ratio gauge that doesn’t solve your needs, similarly, there’s no point in overspending for a feature you won’t need/use. The aim is to find a air fuel ratio gauge that has all the features you need and is in your budget.
3. Decide the features before deciding on a budget
One of the biggest mistakes we make is, we decide a budget first and then start picking the features. This way, we end up limiting our feature set based on the budget. So for instance, a feature you want the most isn’t available in your budget. In a situation like this, most of them end up sacrificing a feature they wanted the most. That’s why I always ask my readers to choose the features before setting a budget.
4. Check Historical Prices
One of the best ways to not overpay for any item is by checking the historical prices and making sure that you’re not purchasing it on the day where the price of the product is on peak or is on the higher end. There are many websites and browser extensions/add-ons that’d allow you to check historical prices of products on websites like Amazon, BestBuy, etc.
5. Compare different options and choose the one that’s suitable for your needs.
The good thing about the internet is it allows you to research different options that sort your needs. For instance, you can compare two air fuel ratio gauge options that come with all the features you need and pick the right one for your needs.
It doesn’t matter what your air fuel ratio gauge needs are, this article aims to help you find the right air fuel ratio gauge option for your use case.
- If you’re looking for the best possible air fuel ratio gauge then you can consider getting the: AEM (30-4110) UEGO Air/Fuel Ratio Gauge, as it comes with the most advanced feature set.
- If you’re looking for a budget air fuel ratio gauge option, then you can consider 30-4110 UEGO Air/Fuel Ratio Gauge AFR 52mm with 4.9 LSU Sensor, WideBand A/F Ratio UEGO O2 Controller Gauge Kit, as it comes with most features and costs much lesser than the AEM (30-4110) UEGO Air/Fuel Ratio Gauge
- If you’re looking for a cheap air fuel ratio gauge with some decent features, then you shall consider getting the AEM 52mm X-Series Gauge Kit Wideband Air/Fuel UEGO & Boost Pressure 35PSI 2.5Bar w/MAP Lanyard Black, as it’s not only cheap but also comes with decent features.
Still haven’t found the right air fuel ratio gauge? Feel free to get in touch with the INDThemes team using our contact page.

It has been six years now since Mark Hill first began covering news on technology. Though it began out of his love for the tech, it grew into his profession and gave him all the name and fame he has today.
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