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From
instrument design
to
accredited test results

One network of specialists.
Built for technology that matters.

Illustrative Animation
«Testing, Inspection,
Compliance, R&D»
Assessimus brings together world-class experts in testing and analysis, technical instrumentation, and R&D services, so your product gets to market with the right data behind it. Some specialists in the network run accredited laboratories. Others design and manufacture the instruments and systems that make precision measurement possible. Six specialists. One coordinated partner.
ISO/IEC
17025
Accredited Companies
6
Specialist Companies
across 3 Countries
Aerospace · Rail · Automotive · Defense · Energy
Material Testing
Product Compliance
Temperature Profiling
EMC / EMI Testing
Battery Management
Failure Analysis
Rail Certification
Aerospace Inspection
R&D Support
Regulatory Consulting

The gaps that slow engineering programs down

The testing bottleneck

Most development teams reach a critical point: the product is ready, the timeline is set, then testing and analysis become the bottleneck. Finding the right accredited specialist, managing multiple labs, and ensuring no standard is missed can take months that most programs cannot afford.

The instrumentation gap

Others hit a different wall: the instrument or system they need to make the right measurement does not exist in any catalog. The operating conditions are too specific, the voltage levels too demanding, or the detector interface too unusual for anything off the shelf to work. The testing bottleneck and the instrumentation gap are both problems the Assessimus network was built to solve.

The solution

Assessimus is a curated network of genuine specialists, each world-class in their field, who work together as one coordinated partner.
Clients get the depth of a dedicated expert at every stage — without managing five separate supplier relationships or explaining their project from scratch each time.

6 specialist companies

Covering testing, analysis, instrumentation, battery systems, and electronics

3 markets

UK, Germany, and USA, with European and global reach

From custom instrument design to accredited test results

One network covers the full picture
Services

What the network delivers

The Assessimus network operates across two complementary disciplines. Some members run accredited testing and analysis laboratories. Others design and manufacture the technical instruments and systems that make precision measurement and compliance possible. Together, they cover the full picture.
TESTING & ANALYSIS SERVICES
TECHNICAL SYSTEMS & INSTRUMENTS
The Network

The specialists
behind the network

Every member of the Assessimus network is independently excellent in their field. Some operate accredited laboratories. Others manufacture the instruments and systems that labs and engineers depend on. Together they cover a breadth of technical capability that no single company can match.

Rotronics

Bristol, UK · Battery Management
Proactive fleet battery health monitoring. The ROBIS System for continuous battery diagnosis and maintenance integration.

RST Labs

Berlin, Germany · Material Testing
Independent material testing, fire classification, environmental simulation, failure analysis. ISO/IEC 17025 accredited (DAkkS).

Phoenix TM

Cambridgeshire, UK & Löhne, DE &
Clearwater, FL, USA · Thermal Systems
Thru-process temperature profiling systems and TUS solutions. NADCAP AMS2750 and CQI-9 specialists.

Solar Electronics

North Hollywood, CA, USA · EMC Equipment
EMC and EMI test equipment manufacturer. ISO/IEC 17025 accredited calibration. MIL-STD-461 and RTCA/DO-160.

GBS Elektronik

Dresden, Germany · Custom Electronics
Bespoke high-voltage electronics, nuclear instrumentation, and multi-channel analyzers. 25+ years of engineering.

Traction Chargers

Devizes, UK · Charging Systems
Intelligent battery charging systems for automotive, industrial, marine, and OEM applications. 30+ years.

Why engineering teams choose
the Assessimus network

Genuine specialists, not generalists.

Every network member is world-class in their specific field. Clients get focused expertise, not the diluted capability of a broad-brush lab trying to cover everything.

Testing and instruments under one roof.

Most networks offer testing services. Assessimus also includes companies that design and manufacture the instruments and systems behind the measurements — from EMC test equipment to nuclear measurement electronics to battery management platforms. That depth is rare.

One partner, fewer headaches.

Instead of sourcing and managing five separate suppliers, clients deal with one coordinated network — with fewer delays, clearer accountability, and no gaps between disciplines.

Built by people who have done it before.

The Assessimus leadership team co-founded Tentamus — a global network now with 4,000+ people across 23 countries. The same approach, applied to the right industries.

Frequently asked questions

Assessimus is a specialist network spanning two complementary disciplines: testing and analysis services — including accredited material testing, fire classification, and temperature profiling — and technical systems and instrumentation, including EMC test equipment manufacturing, battery management systems, custom nuclear instrumentation, and intelligent charging systems. The network operates as a single coordinated partner, connecting clients with the right specialist for their project without the need to manage multiple supplier relationships.

Assessimus does not issue regulatory certifications. Network members provide the accredited testing, analysis, measurement, and instrumentation that engineers and product development teams need to meet compliance requirements and support certification by the relevant regulatory bodies. The distinction matters: Assessimus helps clients get the right data and the right equipment — the certification process itself is handled by the appropriate national or international bodies.

Pre-compliance testing evaluates a product against relevant standards before formal testing takes place. It identifies potential failure points early, reducing costly re-tests, avoiding schedule delays, and giving development teams the time to fix issues while there is still budget and runway to do so.

ISO/IEC 17025 accreditation is held by specific testing and calibration members of the network — not by the Assessimus Group entity itself. This accreditation confirms that those members' test methods, equipment, and results meet internationally recognized requirements for technical competence. Accreditation details for each member are listed on their individual pages within the network directory.

Use the Find a Specialist tool on this page, or contact Assessimus directly. Describe your product, the measurements or systems you need, and your timeline — and we will connect you with the right expert in the network immediately.

Get in touch

Talk to the right specialist today

Tell us about your project: whether you need accredited testing, a custom instrument, a battery management system, or you are not yet sure which part of the network applies. We will connect you with the right expert immediately.
The specialist network for testing, technical instrumentation, and R&D
Built for engineers who need answers they can rely on
© 2026 Assessimus Group · 
Amtsgericht München, HRB 292698
Managing Director: Abgar Barseyten · 
Robert-Koch-Str. 2, 82152 Planegg, DE