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


Latefa El Amrani

Latefa El Amrani


As an independent calibration laboratory of electrical/electronic temperature and geometric measuring equipment, we and our customers benefit from accurate measurement results and good traceability. This requires good and stable measurement and control equipment. To achieve this, a reliable partner is needed that offers high quality and thinks along with us, and TTMS is such a partner. We have been working in good collaboration with TTMS for many years. Technical problems are challenges for them and questions are answered quickly and adequately. TTMS is pro-active: they always think along with us. They are also customer-oriented, flexible, committed and reliable. They always live up their appointments. Also, they are experts, provide good advice and deliver the right equipment. In short, MetricControl likes to work with TTMS.

Hypex Electronics

Joop van Bijnen

Hypex Electronics

I have been doing business with TTMS for years. They offer us good advice, and have a wide range of products to choose from. Before we decide to purchase a product, TTMS allows us to use a demonstration model to experience for a few days whether the product meets our expectations. They think along with us and don't try to sell me just anything. Should it occur, for whatever reason, that there is a defect in the equipment of TTMS, they will follow up with the required service with regard to repair and, if necessary, a replacement. With its service, TTMS invests in a good and lasting customer relationship.


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