Oxygen probes are used to measure the carbon-oxygen content (oxygen potential) inside the furnace. Most of the time, the length and even values can be seen in the oxygen probe models, and providing the model number can immediately determine which specific model is needed.

The company specializes in seven brands: Marathon (MMI), Carbon King (TW), Quicksilver (FC), IPSEN, SSI, MESA, and a Sino-foreign joint venture.