Welcome to Marathon Monitors Inc.! We provide specialized high - low temperature carbon / oxygen sensors and heat treating instruments for atmosphere and combustion control of furnaces, boilers, and incinerators to reduce air pollution emissions.
carbon probes new at mmi
sensors for heat treating
Sensors and instruments for atmosphere and combustion control

An ISO 9001:2008 Registered Firm Providing Quality Service and Products for Over 25 Years!

For Our Mexico Office click HERE - For Our China Office click HERE


Welcome to Marathon Monitors Inc.!  We work with companies that are concerned about product quality, worried about high fuel costs and emissions, frustrated by ineffective solutions, and downright angry about the impact of poor atmosphere and combustion controls on their bottom line. Our heat treating and combustion trim sensors and instrumentation allow you to better control your process - improving quality, reducing scrap, saving fuel, and minimizing unwanted emissions. Come in and see what we can do for you... Heat Treating Combustion control
oxygen analyzer

Marathon named Ohio's Exporter of the Year 2007!

A Member of United Process Controls

Marathon Oxygen Analzers are number one for in-situ applications

Associations and Certifications

Affiliations

ISO9001:2000 Registered

 Carbonseer is the number 1 Carbon Probe

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