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Compliance AFR-64R

compliance controls AFR-64R air fuel ratio controller

Advanced Rich-Burn, Load-Following Air/Fuel Ratio Control System

A lot of control in a single package: The AFR-64R air/fuel ratio controller monitors ambient changes, reacts with precision and diagnoses potential problems before they become costly.

Emissions Compliance: The AFR-64R precisely tracks the air/fuel mix to maintain targeted emissions levels – regardless of variance in load, ambient air temperature or fuel composition.

Flexibility: The AFR-64R controller stores up to 64 load-specific air/fuel set points and automatically tracks engine load changes based on engine RPM and manifold air pressure.

Cost Savings: Pinpoint performance problems as soon as they occur–misfires, engine valve issues and more – to cut the costs of maintenance, downtime, labor and replacement parts.

Whether you need better emissions compliance, engine prognosis/diagnosis and trouble-free equipment life, the AFR-64R helps maximize the efficiency of the engine and its three-way catalytic converter.


Main Features

  •   Fits virtually any gas-fueled, carbureted, rich-burn industrial engine – with or without a catalytic converter.

  •   64 load-specific air/fuel set points and automatically tracks engine load changes based on engine RPM and manifold air pressure (8 x 8 target table).

  •   Windows-based software compatible with most laptop computers used for system setup and operator interface.

  •   Full-color graphic display – optional, enclosure or remote mounted.

  •   Windows-based Data Plotting software for easy and accurate troubleshooting.

Technical Features

  •   Fast, easy, low-cost installation.

  •   Comprehensive 38-fault diagnostics, including continuous oxygen sensor health monitoring.

  •   Separate alarm and shut-down dry contact relays.

  •   Pre-catalyst closed loop, exhaust oxygen feedback control.

  •   Post-catalyst exhaust oxygen feedback; cascade control for fast, real-time adaptation to changing catalyst performance.

  •   Variable set-point for pre-catalyst and post-catalyst exhaust oxygen control – for real-time response to varying engine loads.

  •   Catalyst temperature monitoring for catalyst over temperature protection.

  •   Drives up to two control banks for operation on V type engine configurations.

  •   High-speed full-authority butterfly fuel control valves for quick response time.

  •   Multiple valve control options:Full Authority Valve controls all engine fuel via system- controlled butterfly valve.

  •   Trim Fuel Valve adds supplemental fuel to the air intake via system-controlled proportional fuel valve.

  •   RS-485/MODBUS communications support (available).

  •   NEMA 12 enclosure without display, IP 66 enclosure with optional display.

  •   12 / 24 VDC Nominal.

How To Order

Options listed below applies to all Air/Fuel Controllers. All configurations may not be available. Call your sales representative or Enovation Controls for more information. Sample order AFR-PD-R-64R-21-FA50 below.



Download information for the Compliance Controls AFR-64R in PDF format:


compliance controls literature

AFR-64R - Rich-Burn Air/Fuel Ratio Controller

Sales Bulletin

compliance controls literature

AFR-64R - Rich-Burn Air/Fuel Ratio Controller

Installation & Operations Manual

Murphy Air/Fuel Ratio Control Systems

Sales Brochure


The Compliance Controls AFR-64R is not currently available in the MurCal web store. Please contact the inside sales department for availability, price quote and lead time.