Clarke-Hess was founded as an electronics test and measurement company in 1969. Specializing in DC / low frequency applications, Clarke-Hess develops instrumentation for defense, commercial and industrial companies, and laboratories that meet national standards. Through its dedication to precision instrumentation, Clarke-Hess gained a reputation of representing quality, service, and extraordinary performance.

Clarke-Hess offers the following products:
– Power analyzers
– The Digital Phase Angle Standard
– Phase meters, phase angle voltmeters (PAV), and gain / phase analyzers
– Precision AC current source
Voltage and current sources and / or calibrators
Transconductance amplifiers

For a complete list of the Clarke-Hess 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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