When it comes to portable octane testing, there is simply no other choice. Over 42 State Governments and 50 countries world wide rely on the Zeltex ZX-101 Family of Analyzers to protect their constituents from poor quality fuels. Whether you are looking for Octane, Ethanol Percentage or the percentage of Bio Diesel in Petroleum Diesel Fuels, Zeltex remains the only choice.

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