PAC L.P. A Roper Company

PAC L.P. A Roper Company

PAC is a leading global manufacturer of advanced analytical instruments for laboratories and online process applications in industries such as petrochemical, refinery, upstream, biofuels, environmental, food & beverage, lubricants, automotive and pharmaceutical. With a product portfolio of over 200 testing instruments, PAC serves its customers with cutting-edge technology and significant research and development resources to support its core technologies: chromatography, elemental analysis, physical properties, fuels composition, and laboratory automation.

Company details

8824 Fallbrook Drive , Houston , Texas 77064 USA


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Business Type:
Industry Type:
Laboratory Equipment
Market Focus:
Globally (various continents)

Our corporate strength is built upon the quality of our product lines, our powerful technology team, and our commitment to customer support.

We're an industry leader in standards development, and we work tirelessly to establish benchmark procedures that scientists and analysts around the world rely on every day to build better products and a cleaner environment.

PAC operates as a unit of Roper Technologies, Inc., a diversified technology company and a constituent of S&P 500, Fortune 1000, and Russell 1000 indices.

The story of PAC is one of synergy — of a group of long-established scientific companies with complementary technologies and philosophies coming together to create a powerful, innovative company that leads the industry in laboratory and process analytical solutions and advanced techniques.

PAC's history begins with the origins of its individual well-known and long-established leading brands, including AC Analytical Controls, Alcor, Antek, Cambridge Viscosity, ISL, PetroSpec, Phase Technology, PSPI and Walter Herzog. The original companies were founded in:


However, more important than the founding dates of the individual members of the PAC team, is the successful and innovative companies that each evolved into and their roles today since becoming part of PAC.

PAC's story begins to truly gather momentum just before 2000, when ISL joined with Varlen Instruments to become part of PAC. Varlen Instruments dissolved and those subsidiaries, now part of PAC, included PSPI, Herzog, Alcor, and PetroSpec, which had all been acquired by Varlen during the 1980s and 1990s. Antek joined PAC in 2000 and AC Analytical Controls joined in 2006.

The most recent acquisitions are Cambridge Viscosity in 2012, and Advanced Sensors in 2013.

The contribution that all of these separate brands brought to the PAC entity was and is enormous. Each product line has a long history of developing best-in-class analytical instrumentation. 

In the decade since PAC began its current phase of growth and expansion, the company has emerged as the global leader of advanced analytical instrumentation.