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Gledewen

30-0300 Wideband UGEO Air Fuel Ratio Gauge 52mm(2-1/16"), AFR/Lambda Controller Kit with LSU 4.9 Sensor

  • Based on 70 reviews
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Availability: In Stock.
Fulfilled by Amazon
Arrives Sep 14 – Sep 15
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Features

  • What A Easy Helper! Featuring sweeping 24-color-coded LED display and four-digit central readout, the faceplate of wideband gauge is two-sided and reversible. Thanks to it, the afr gauge can switch between 3 display modes of air-fuel-ratio, lambda, oxygen percentage at will, by that means you are able to effectively but quickly monitor your vehicle's conditions.
  • Core Technology To maximize your engine's power while stay safe, an air fuel ratio gauge kit is must-have! The Gledewen AFR gauge helps to identify sensitively every slight fluctuations of air-fuel ratio and report precise and reliable reference to the car engine in real-time, and in particular it matches with LSU4.9 UEGO, ensuring its faster and more precise response(20ms typical).
  • TWO Calibration ModesResistor Trim Mode(rCAL) or Free Air Mode(ACAL)? It is up to you! The supplied UEGO sensor is factory calibrated via a trim resistor, integral to the sensor connector, and rCAL is the recommended calibration mode for best accuracy, for most users, there is no further action or calibration required.
  • Widely ApplicationsA wide range of applications is waiting to be explored. The wideband o2 sensor gauge provides 0-5V analog and serial RS-232 output that make it perfectly compatible to get access to read and record data from controllers, meanwhile, it supports vehicle/system voltages up to 16V.
  • 12-MONTH WARRANTYIf the wideband AFR sensor controller gauge kit fails, stops working or any other problems, you can rely on our service of carefree REPLACEMENT or REFUND

Description

The UEGO gauge will indicate changes in the air/fuel ratio in real time, which is essential when you aim to perform safer, more powerful and accurate engine tuning.Specifications:52mm(2-1/16") Diameter MountingCompatible with Vehicle/System Voltages up to 16V0-5V Analog OutputSerial RS-232 Output20ms Typical Response8.0:1 to 20.0:1 AFR / 0.55 to 2.00 LambdaConfigurable 3 or 4 Digit Precision Display ModesConfigurable AFR, Lambda or O2% Display ModesFree Air or Resistor Trim Calibration ModesAuto Dimming FeatureGledewen Wideband UEGO Air Fuel Ratio Gauge Kit Includes:1 UEGO Gauge1 Wideband Oxygen Sensor1 PWR/IO Cable1 Sensor Harness4 Butt Connectors1 Silver Nut1 Installation InstructionUsage Steps1. Connect Harness A to Port A.2. Connect Harness B to Port B.3. Connect the other end of Harness B to the sensor.4. The other end of Harness A has a red wire for the positive terminal and a black wire for the negative terminal.5. Connect to a 12V power supply. The instrument will start working, with a working voltage of 12V.6. The dashboard has a setting and selection button, allowing for 8 function switches.7. In the 4-digit mode, press the left button to switch to the 3-digit mode. Press the select button to confirm, which will change to 3-digit mode. Keep pressing to switch to the initialization mode or air-fuel ratio mode.8. Change to CAN mode for engine combustion ratio calibration and adjustment. This can increase the combustion ratio and improve engine efficiency.

Brand: Gledewen


Item dimensions L x W x H: 5.32 x 5.32 x 5.32 inches


Item Weight: 1.2 Pounds


Maximum Supply Voltage: 16 Volts (DC)


Measurement Accuracy: ±1%


Product Dimensions ‏ : ‎ 5.32 x 5.32 x 5.32 inches; 1.2 Pounds


Item model number ‏ : ‎ A1417


Date First Available ‏ : ‎ October 13, 2023


Manufacturer ‏ : ‎ Gledewen


Best Sellers Rank: #110,777 in Automotive (See Top 100 in Automotive) #6 in Automotive Replacement Air & Fuel Ratio Gauges


#6 in Automotive Replacement Air & Fuel Ratio Gauges:


Customer Reviews: 3.7 3.7 out of 5 stars 70 ratings


Frequently asked questions

If you place your order now, the estimated arrival date for this product is: Sep 14 – Sep 15

Yes, absolutely! You may return this product for a full refund within 30 days of receiving it.

To initiate a return, please visit our Returns Center.

View our full returns policy here.

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Top Amazon Reviews

    • Works great
I bought this for my 1930 Model A hotrod, I wanted to make sure that my Holley carburetor was tuned properly and not running too lean or rich, which is not good for the engine. The install was easy, and I mounted it on the steering column so I could read it without distraction. Everything in the product description was correct, and so far, it's been functioning perfectly. The price point was within my budget, and it works just as well as higher priced units. I would recommend this AFR gauge to anyone who wants to tune their engine the easy way. ... show more
Reviewed in the United States on December 4, 2024 by Steve M.
    • Not recommended
I bought this gauge kit and the first one would not read right. I sent it back and received a second one that did not read right again. I could not send it back because I waited too long. I purchased an AED gauge kit and it works perfect...never had another problem with the AED unit. I would not recommend this unit...stick with a name brand unit auto-meter or AED! ... show more
Reviewed in the United States on August 18, 2025 by Lostswitchman
    • Excellent value
I used a slightly longer bung than provided and welded up a temporary exhaust extension for my experimental airplane to tune the carburetor. It has been a game changer, as I was running WAY too lean. With reliable data, I was able to rapidly get my engine dialed in. I'm using leaded fuel in this application, but in this temporary installation I think the heated sensor will last long enough. There are specialized tuning meters available, but I wasn't sure this whole deal was going to work, so I went the inexpensive route to minimize financial risk, but it's worked out great. The documentation is Just Enough for an experienced mechanic to figure out how to install it. ... show more
Reviewed in the United States on December 3, 2024 by R. Young
    • Would buy again
Fantastic unit for the price. No complaints. The included o2 sensor has been awesome. Even in fuel soaked rich carburator conditions, it has not fouled out, while an older 4.2lsu sensor mounted next to it has fouled out twice. 4.9lsu sensor is best.
Reviewed in the United States on June 18, 2025 by Jacob Boucher
    • Afr gauge
Afr gauge works just as expected. It does exactally. Works as good as my AEM gauges. Would recommend, and would buy again
Reviewed in the United States on August 14, 2025 by Tom Katz
    • I use this to setup my carburetors on my street bikes
Item works great and exactly as described
Reviewed in the United States on May 1, 2025 by Derick
    • Waste of time and money
It's a garbage product. I installed the sensor and wired up the gauge and it doesn't work at all, the gauge jumps around for about 10 seconds then bottoms out at it's lowest reading of 8.01. The buttons on the gauge face are cheap and most of the time don't actually do anything when you press them, tried wiring it into my HP Tuner with a Pro-Link cable and there is no voltage signal. Thought maybe I got a dud and returned it and got a replacement, hooked it all up and this one doesn't work either. I'll get my money back from Amazon but the waste of time and effort is frustrating. Don't be me, buy from a reputable company who makes a functional product. ... show more
Reviewed in the United States on January 4, 2025 by Kaphs_kcin93
    • Worked great for 2 days.
Worked great for 2 days then started dying. I looks like something in the gauge itself. It keeps going dark and resetting itself. Checked my power going to the gauge and it is solid. Problem is in the gauge itself. Poorly made perhaps. It did help me id a over rich condition on my car, so it wasn't a complete loss. I leaned out the jets and my car is running better than ever. It was easy to install and when it works...it was great. I do wish it had lasted long enough to remain in my dash so I could ID issues as they arise with fuel delivery. ... show more
Reviewed in the United States on November 2, 2024 by Dave Riley

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