Marathon Sensors Inc. provides a wide variety combustion control instrumentation including single-loop and dual-loop atmospheric or temperature controllers.  These controllers can be used with virtually any application.

MSI provides a wide variety of equipment instrumentation that can be used with virtually any application including single-loop and dual-loop atmospheric or temperature controllers.

Unlike mass-produced instrument offerings, all Marathon instruments come with a full, 18-month warranty. Even more valuable to the end-user is Marathon's free phone support for the duration of the warranty period. No more endless phone menus and frustration trying to find someone who can solve your problem at some giant company. With Marathon Instruments, you'll be doing business with a company that knows who you are and will do what it takes to keep you running.

Oxymit Oxygen / Temperature Transmitter with Probe Maintenance (manufactured in Cincinnati, Ohio)

The Oxymit transmitter provides a cost-effective solution for oxygen and temperature transmission (4-20 mA) to your DCS system. This DIN rail module provides full probe maintenance / probe verification functions and can be integrated with Marathon's QuadBox to provide reference air, verification gas and probe maintenance for up to four probes in a single enclosure.

VersaPro (manufactured in Cincinnati, Ohio): sets a new standard for value by providing single-loop control with industry-standard compatibility at a cost well below that of competitive units.

Developed for flexibility and value, VersaPro can be factory-configured for control of Carbon Potential, Dewpoint, Temperature, ReDox Potential or Oxygen Concentration. By utilizing a single, cost-effective base platform for each of these tasks, VersaPro lowers the costs of state-of-the-art process control, while raising performance and delivering the highest value in the industry.

With advanced auto-tune PID control capabilities and support for industry standards such as EasyLink OPC^TM, Modbus and Marathon Protocol, the VersaPro not only supports your existing systems, but also serves as a future-proof building block as your system grows.

VersaPro also sets a new standard for ease-of-use with its integrated alphanumeric display. Operators no longer have to contend with confusing symbols found on other low-cost controllers. Instead, standard English words provide menu prompts and alarm messages.

DualPro: The DualPro is a dual-loop process controller. The DualPro includes calculations for various process variables including carbon atmosphere, dew point, and percent oxygen. Exceptional flexibility is provided by the DualPro's ability to execute basic programs, logic programs, and recipe programs. The DualPro has four communications ports for powerful networking capability.

Standard Features:

• Up to 200 19-step heat treat cycles
• Large LED display (Upper display atmosphere PV, lower display temperature)
• Customer configurable from front display
• Modbus communications

• 200 background logic programs requiring calculations or decision making
• Three (3) programmable isolated analog inputs (T/C, 4-20mA, slide-wire or linear voltages available)
• Four (4) events partitioned as either inputs or outputs (expandable to 68)

CarbPro: The CarbPro is a recipe programmable single loop atmosphere controller. The CarbPro can control variables such as % carbon, dew point, or millivolts. Control outputs are available for solenoid valves and motorized valves using either contact, voltage, or current loop. The recipe program can control four internal plus sixteen external input or output events and a slave temperature controller.

Standard Features:

• Up to 200 19-step heat treat cycles
• Large LED display (upper display atmosphere PV, set point in lower display)
• Customer configurable from front display
• 4 - Events (expandable to 64 events)

UniPro: The UniPro is a temperature controller with internal memory for up to 200 19-step recipes, two 4-20mA output, T/C selectable input, 2 Alarm and 2 control contacts, and four on-board events.