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Calibration Gases


Calibration Gases and Specialty Calibration Gases


Cal Gas Direct Incorporated has the largest selection of Calibration Gas in the United States of America. With well over 100,000 Products available we are not only the largest we are also the low price leader of Calibration Gas and Specialty Calibration Gas. We are often copied but our products/service/pricing can not be duplicated. Our Calibration Gases are Made Proudly in the United States By GASCO Affiliates LLC. Cal Gas Direct Incorporated is a Authorized Distributor of GASCO Calibration Gas products. We ship all throughout the United States and have production facilities strategically located in Oldsmar Florida, or Pasadena Texas allowing for quick efficient shipments to your geographical location.  

GASCO is the leading and only independent manufacturer of Precision Calibration Gas Mixtures. Gasco has the capability of providing a wide range of simple mixtures such as ultra high purity Nitrogen, as well as complex four gas mixtures and highly reactive gas mixtures. 

Cal Gas Direct Incorporated provides the largest selection of OEM Calibration Gas Equivalents. We provide these cross reference numbers to allow our customers to easily find their needed calibration gas for their monitors/detectors. Many OEMS have stopped producing their own gas and have long lead times, so it is essential we can provide these gases to our customers accurately and in a timely manner. Our OEM Calibration Gases are made by GASCO and not by the Original Equipment Manufacture's (OEM) themselves. 

Many Companies will claim to have GASCO Calibration gas or even offer a "GASCO equivalent". However with the largest selection in the USA and our low prices, Cal Gas Direct Incorporated ensures that you will not have to settle for substitutes or "GASCO equivalents". 




  • Gasco is always ready and flexible to meet customer needs.
  • Gasco has the best customer service in the industry to fulfill your requirements.
  • Gasco maintains inventories for Next Day, Same Day shipments, and Will Calls.




  • Gasco has the facilities and expertise to blend gases to your exact specifications.
  • Expert employees have both the knowledge and the know-how to recommend the proper gas mixture and delivery technique for your calibration requirements.
  • Gasco consistently meets or exceeds customer requirements.
  • GASCO’S precision and quality is consistent with NIST standards.
  • GASCO Calibration Gases are industry Standard Certified Calibration Gas 




  • There are no minimum quantity orders.
  • Gasco provides exceptional products and services at a competitive price.
  • Factory Refillable Cylinders Available (ecosmart cylinders)
  • No Rental Fees
  • No Deposit Fees



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