APECS Controllers

Advanced Proportional Engine Controls System (APECS) Controllers  

Micromax offers the Advanced Proportional Engine Controls System (APECS) controllers which provide isochronous or multi-speed engine governing through a wide speed range. Using electronic controllers’ means diesel emissions control, CAN communications and engine protection are all possible. They also provide proportional fuel control for construction, industrial and agricultural equipment.

APECS controller models are available for isochronous governing of generator sets or compressors in single- or two-speed control. Other models provide single- or multi-speed governing for construction and other industrial applications. APECS controllers are readily configured using the APECS software calibration tool, helping to prevent field tampering of control settings.

The complete system consists of a powerful microprocessor-based controller driving a precision proportional actuator. The actuator is connected to the engine’s throttle or fuel pump speed lever to precisely control engine speed. We offer a spring-return actuator that is 3 inches in diameter (three spring types available) and pull or push models.  

Click here to view our APECS Controllers product list


The state-of-the-art APECS digital governor system provides the flexibility to solve most engine control applications including:

  • Power Generation
  • Industrial
  • Marine
  • Automotive
  • Construction
  • Agriculture/Forestry.


Our chosen supplier of APECS Controllers is Woodward (USA).

Industries serviced

  • Rail and public transport
  • Mining
  • Manufacturing
  • Agriculture
  • Marine
  • Refrigerated transportation.

More Information

To enquire about a product or speak to an expert in APECS Controllers, please:

Related Diesel Engine and Power Generation Controls

Solenoids  - Shutdown Kits  - Solenoid Accessories  - Alphabox – Engine Diagnostic System  -  Timer Modules  - Electronic Governors  - APECS Controllers  - Electronic Speed Switches  - Speed Sensors  - Oil Centrifuge  - Thermostatic Valves


Apecs 5000


  • User-selectable isochronous or droop governing
  • Engine protection switch input connects to one or more user-selected engine protection switches (e.g. engine coolant, engine oil pressure)

Apecs 4500


  • Control capabilities include engine/ ground speed control, rate of acceleration control, drive-by-wire operation, variable speed operation, and power takeoff operation.
  • Sealed, waterproof connectors assure reliability

Apecs 4000


  • User selectable isochronous or droop governing
  • PTO enable switch to select between pedal input and speed switches in mobile applications
  • User selectable engine protection switch input

Apecs 3000


  • Isochronous engine control
  • All-digital electronic technology
  • Calibrations set with a personal computer
  • Easy to calibrate with APECSstart-up wizard
  • All settings remain in memory during shutdown

Apecs 2000


  • Proportional, Integral and Derivative control (PID)
  • Surface mount technology
  • Signal source: magnetic pickup
  • Electrostatic discharge protection
  • Reverse polarity protection
  • Protection against miswiring

Apecs 500


  • Frequency range (200-15,000 Hz)
  • Synchronized speed sampling
  • Proportional, Integral and Derivative gains
  • Overspeed shutdown and delay
  • Underspeed shutdown and delay
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