In 2006, Ohm-Labs started as a Process Instruments offshoot, focusing exclusively on resistance products. Part of their expertise comes from the famous company Leeds & Northrup. Process Instruments acquired resistance wire, fittings, and related resistance production test equipment in 1994.

Ohm-Labs acquired manufacturing tools and the rights of Electrical Instrument Service / Sensitive Research after the owners retired in 2010.

Through continuous improvement and consultation with top researchers from the world’s national testing institutes, Ohm-Labs builds on the best features of the L&N, JRL, and EIS products by implementing and refining improvements, thus delivering pioneering resistance products.

Ohm-Labs produces:

– Standard resistors
– Precision current shunts
– High voltage dividers

Ohm-Labs’ quality is accredited by the American Association of Laboratory Accreditation (A2LA) to IEC / ISO17025, including ISO9000:2000 and ANSI/NCSLI Z540.1 standards.

All Ohm-Labs products are made in the USA and include accredited calibration.
“Excellence in Resistance” is their goal.

For a complete list of Ohm-Labs products, visit their website



Arnold Memelink

Arnold Memelink


"The ABB Power Grids Jumet organisation is an innovative development and production facility of ABB that manufactures active filters and battery energy storage systems to support a stable grid. To test these systems we have acquired two Cinergia GE/EL +120kVA eplus units capable of doing grid emulation (AC + DC), operating as an electronic load (AC +DC) and being a battery emulator. We have experienced very good support from TTMS in obtaining these two Cinergia units. This included organising an on-site demonstration and supplying loan systems prior to the delivery of our final systems. This way we could start testing as early as possible. TTMS also organised training for the operators from the original manufacturer. This support allowed us to introduce the first battery energy storage systems even prior to the full delivery of the Cinergia systems."

University of Luxembourg

Sasan Rafii-Tabrizi

University of Luxembourg

“At the Energy and Environment department of the Faculty of Science, Technology and Medicine (FSTM) of the University of Luxembourg we do have different research projects related to green energy contributing to the development of eco-cities. As a long-standing partner of our research unit, TT&MS has proven that they are able to answer even the most complex questions in a professional manner. They have shown that they are always up to date with the latest technology and do not spare any effort to look at the application and even the situation on site. The exchange of ideas was always very pleasant and took place quickly. We look forward to further years of fruitful cooperation.”


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