• Extrel is the world's leading manufacturer of Research and Process Mass Spectrometers, Residual Gas Analyzers (RGA's), Quadrupole Mass Spectrometry Systems and Components.

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  • Servomex     established itself as the leading provider of reliable, accurate and stable gas measurement solutions to industries across the globe.

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  • Setra     designs and manufactures a broad line of pressure, vacuum, humidity, and current sensing instruments.

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  • Kaiser Optical Systems     is a world leader in spectrographic instrumentation and applied holographic technology.
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  • Shelter Works™     makes the world's strongest, longest-lasting fiberglass composite shelters.


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Serving the Central Midwest Region (Southern Illinois, Iowa, Kansas, NW Kentucky, Missouri and Nebraska), Adelphi Incorporated is a Manufacturer's Representative providing the most advanced measurement instrumentation and controls solutions available to our diverse industries.
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