Your Trusted Calibration Partner

Family-operated since 1969, we pride ourselves on providing the best possible service.

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A Legacy of Precision

Calibration Services Inc. (CSI) began in the late 1960s as R.H. Forney Calibration Services in New Castle, PA. In 1974, William “Bill” Stump Jr. joined the team and eventually took over the company with his wife Martha in 1983.

As demand grew, CSI relocated first to Edinburg, PA in 1984, then to its current facility in Emlenton, PA in 1992 — adding an in-house lab to better serve clients. Over the years, the company has expanded its services across 14 states and U.S. territories in the Caribbean, earning ISO 17025 accreditation in 2002.

Still family-owned and operated, CSI is proud to be a trusted partner in precision, backed by experienced technicians and a commitment to quality service.
2121
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Valued Customers

14

States Covered

10
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Industries

57
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Manufacturers

 

CSI: Powered by Accredited Labs

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Calibration Services Inc. has been family-operated for more than 50 years. Now that we’ve joined the Accredited Labs family, we’re able to offer even more to our valued customers—combining our precision calibration and repair services with the resources, innovation, and nationwide support of an industry leader.

What This Means for our Customers

By joining forces with Accredited Labs, CSI customers now benefit from:

  • The Same Personal Service, Backed by National Support
  • Advanced Expertise & Certified Accuracy
  • Seamless Compliance & Peace of Mind
  • Strengthening Our Commitment to You
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Our Expert Team


Our Staff of professionals are highly trained in calibration and repair of physical testing instruments of many different manufacturers. We are independent service representatives of many major manufacturers of testing equipment. While many of our calibrations are performed on-site with our well-stocked service fleet, we also maintain highly trained in-house professionals to meet the needs of our global clientele. Our Staff has received extensive on-site training and manufacturers training to meet the needs of our clients. Our firm’s principles are actively involved in the ASTM committee to maintain close adherence to specifications specific to our scope of accreditation. Our personnel provide quick, precise, and comprehensive service to our clients; total client satisfaction is our goal. Our current service area covers over 14 states and multiple offshore sites. We offer both on-site and in-house capabilities in calibration, repair, and upgrade of physical testing equipment. Our client base ranges in private and public sectors and covers a broad base of industrial and research environments.

 

CSI is located in a facility consisting of 8,000 sq ft. Our fleet of on-site, temperature-controlled vehicles service our on-site clients. Each unit is stocked to handle a multitude of calibration requirements efficiently and quickly. Our on-site laboratory provides precision calibration and repair facilities for testing equipment.

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late 1960s

Calibration Services began as R.H. Forney Calibration Services, located in New Castle, PA. During these early years, the Company’s main thrust was the calibration and servicing of Forney Testing Equipment. By 1974, William (Bill) W. Stump, Jr. joined the Company, becoming partners with Russell Forney, Jr., the owner at that time.

1981

As the Company continued to flourish, its name was changed in 1981 to what it’s known as today, Calibration Services, Incorporated (CSI). By then, Bill had been working as a part-time technician for the Company since 1977, transitioning to a full-time calibration technician in 1982. At this time, CSI purchased its first load call system, utilizing new innovations to calibrate physical strength testing machines. This was a significant advancement for the calibration industry, and just as it still is today, CSI was on the leading edge of technology.

1981

1983

William W. Stump Jr. and his wife Martha Stump purchased the shares of Russell H. Forney Jr. and took over the business. With the increasing customer demand, the Company soon outgrew its operations in New Castle and relocated to Edinburg, PA, in November 1984. At this new location, an in-house laboratory was added, complete with precision pressure standards, permitting technicians to calibrate equipment and repair instrumentation at the facility. To expand services and have more room for the growing organization, in 1992, CSI relocated to its current location in Emlenton, PA.

2003

After working alongside his father for nearly 20 years, Bill and his wife Jameen purchased the Company. Since then, CSI has significantly increased its scope of calibration, encountered new markets, and has grown its servicing areas to over 14 states, the Caribbean (U.S. Territories), and other locations. CSI obtained ISO 17025/90023 accreditation for calibration in March 2002.

2003

2025

CSI joined the Accredited Labs family

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