Ballenger AFR500CAN – Air Fuel Ratio Monitor Kit – Wideband O2 System

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  • Regular price $564.98
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As one of the most important supporting tools any tuning professional or enthusiast needs to properly tune a vehicle, finding a wideband O2 monitor with superior quality, accuracy, and functionality is crucial. The Ballenger AFR5000CAN Air Fuel Ratio Monitor applies the same calibration quality AFR ratio from its AFR500v2 with the advantage of plug and play digital CAN Bus messaging. Furthermore, the AFR500CAN offers a massive variety of true wideband sensors depending on your budget.


The AFR500CAN reads AFR values from 9.0:1 to 16.0:1 (0.62-1.1λ) for standard range or 6.0:1 to 20.0:1 (0.411-1.373λ) for wide range with a resolution of 0.1. Additionally, the AFR500 utilizes sensitive Nernst style, pump, and reference cell-based sensors that can detect a broad spectrum of oxygen concentrations to accurately interpret AFR in a variety of combustion environments.


The Ballenger Motorsports AFR500CAN offers a linear analog output to be used as an input to engine control systems, gauges, or data acquisition systems, like HP Tuners. The output varies from 9:1 at 0v to 16:1 at 5v for the standard range or 6:1 at 0v to 20:1 at 5v for the wide range.


The base AFR500CAN comes complete with:


CAN Flying Lead & USB programming harness

PC Software for full digital programmability

Large, bright digital display controller (~3.4in x 2.7in x 1.3in)

13 ft wiring harness with sealed connections

Upgraded NTK product grade sensor included.

Weld in steel exhaust boss & plug

Mounting Velcro

Comprehensive Installation, troubleshooting & tuning manual

CAN specific manual addendum

CAN Bus Output with software configuration options to work with most systems

0-5 volt Analog Output Signal

11-28 volt Input Power (24v system capable)

Compatibility with most aftermarket ECUs

Compatibility with HP Tuners

Changes for the V2 model:


Lambda Display Option

Extreme Range option for FI methanol & laboratory applications

0.411-1.373 Lambda

6-20 Gas AFR

2.66-8.88 Methanol AFR

Increased display speed

Bosch LSU 4.9 Option (Not recommended for methanol)

Methanol Display Option

Faster analog output

All harnesses, control units, accessories, etc. (except the LSU 4.9) are backward and forwards compatible

Options are selectable at any time via internal jumpers

Compatible Fuel Types:


Gasoline / Petrol (leaded or unleaded)

Alcohol (Methanol)

Ethanol (E100, E85, E20, E15, E10, etc.)

Flex Fuels

Compressed Natural Gas (CNG)

Liquefied Petroleum Gas (LPG)


Many other combustible fuels