Founded by Andrew King in 1936, KING Tester Corporation manufactures portable Brinell hardness testers and related metal-testing equipment in the USA. Its rugged testers bring a full 3,000 kgf load to large or hard-to-reach parts, while its newer KingScan® V provides automatic Brinell readings in under five seconds. KING also operates an ISO/IEC 17025:2017-accredited laboratory for ASTM-compliant calibration and repair services.
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ASTM E10 Compliance
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ASTM E110 Compliance
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NIST Traceability
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INNOVATEST Europe BVFrom its Maastricht headquarters, INNOVATEST Europe BV designs and manufactures hardness-testing machines for metals, plastics and other materials. The company traces its industrial history to 1890 and has focused exclusively on hardness testing since 2008, producing and quality-assuring its systems in the Netherlands for customers in more than 80 countries. Its equipment supports work ranging from laboratory research to production and in-line quality control, with ISO 9001 certification and a global service network.HORSHAM, PA
Tinius OlsenFounded in Philadelphia in 1880 after Tinius Olsen invented the “Little Giant” universal testing machine, Tinius Olsen manufactures materials-testing equipment for laboratories and industrial users worldwide. Still run by Olsen’s descendants, the company pairs its long history of testing-machine innovation with automated systems, data software, and accredited calibration services.HORSHAM, PA
IET Labs, IncFounded in 1976, IET Labs manufactures precision electrical test and measurement equipment, with a particular focus on metrology standards and meters for resistance, capacitance and inductance. The U.S. manufacturer also preserves the GenRad and esi instrument lines acquired in 2000 and 2006, while providing calibration and repair through its ISO-17025-accredited laboratory. IET says 98% of its products are manufactured in the United States.ROSLYN HEIGHTS, NY
Dunn's Valve Testers, IncDunn’s Valve Testers traces its Houston-area manufacturing legacy to 1978, when founder Emmitt Dunn produced the company’s first valve-testing machine for the U.S. Navy. Today, the company builds made-in-USA testing equipment to customer specifications and supports machines throughout their working lives, including systems that have remained in service for more than 30 years.MIDDLETOWN, NY