a few words about us

Adelphi Incorporated is a Manufacturer's Representative that is committed to providing the most advanced measurement instrumentation and controls solutions available to our diverse industries.

Since 1971, we have focused on developing long-term relationships with our customers. This approach has enabled us to understand their unique needs and recognize industry trends so that we can continually provide customized solutions to improve safety in the manufacturing environment, increase efficiency, and add value with higher quality products at lower costs.

Adelphi Incorporated serves the Central Midwest Region of Southern Illinois, Iowa, Kansas, Northwest Kentucky, Missouri, and Nebraska with centrally located offices in St. Louis and Kansas City.


  • Ambient Gas Monitoring
  • Combustibles, Toxics, and Oxygen
  • OEM Transducers
  • Process Gas Analysis
  • Inerting Applications
  • Emissions Analysis
  • Energy / Biofuels
  • Materials Research
  • Gas Purity
  • Pharmaceutical
  • Drying, Material Analysis, Product Analysis
  • HVAC
  • Pressure, Room Conditions, Humidity
  • Petrochemical
  • Cracking, Blending, Hydrocarbon Processing
  • Catalyst Analysis
  • Polymers
  • Blending, Cross-Linking, Reaction Control
  • Food Sciences