Herholdt Controls:
an engineering task force
Enter the Lab
Precision engineering, since day one
Herholdt Controls was founded in 1991 by Hans Herholdt to design industrial energy metering systems.
From the beginning the work focused on measurement technology designed for real applications, where reliability, integration and industrial production all matter.
From supplier to engineering partner
Over time the company moved beyond the role of meter supplier.
Today Herholdt Controls works with OEMs, system integrators and energy solution providers on the development of metering architectures, hardware and firmware, supporting integration into complex systems.
Part of Hager
Herholdt Controls joined Hager in 2017.
The integration strengthened production capacity and long-term supply continuity while Herholdt Controls continues to operate as a specialized engineering and R&D structure within the Group.
Engineering Focus
Today Herholdt Controls works on industrial metering and energy management projects that require integration, customization and close collaboration with OEM engineering teams.
The company operates in the space between large industrial manufacturers and commodity suppliers, acting as a technical project partner.
Customisation
Many projects start from existing hardware platforms and evolve according to the application.
Firmware adaptations, protocol implementations, embedded designs and private label versions are part of the normal development process.
In some cases the work begins from a fully custom design.
Supply chain control
Production is based in Italy with direct control over key stages of the process including component sourcing, SMT assembly, firmware development and final validation.
This structure allows the company to maintain stable production and predictable delivery times even when the electronics supply market becomes unstable.
Our direction
The focus remains on supporting companies that build energy systems, EV charging infrastructure, HVAC platforms and other energy technologies that require reliable metering.
100% Made in Italy
Design, manufacturing and testing performed in Italy, with a tightly controlled local supplier network.
ECS and custom development
ECS is the energy meter product line developed by Herholdt Controls for industrial, building, HVAC, EV infrastructure, and energy management applications. It is an industrialised, validated, and certified platform that can be deployed as a complete stand-alone solution with consolidated hardware and proprietary firmware.
The ECS line is stable and scalable, available in MID and non-MID versions with multiple communication options. In addition to the standard platform, Herholdt Controls also develops fully customised solutions, ranging from modifications to electronics, firmware, interfaces, mechanics, or branding to entirely new architectures designed from the ground up.
MID: Certified energy measurement
Directive 2014/32/EU defines the framework for legally valid measuring instruments within the European Union. Herholdt Controls obtained MID certification in 2009 and has updated its products according to the latest harmonised standards, including EN 62052-31 safety requirements.
MID compliance impacts hardware tolerances, calibration processes, firmware management and traceability procedures. It is embedded in the design phase, not added afterwards. Testing and validation activities are supported by an internal certified CTF laboratory.
Certifications and industrial control
Herholdt Controls operates within a certified management framework governing design, supplier control and production traceability.
Quality and compliance are integrated into engineering, manufacturing and final validation processes.
RoHS
EU Directive restricting the use of specific hazardous substances in electrical and electronic equipment.
Reach Compliant
EU Regulation governing the registration, evaluation and control of chemical substances placed on the European market.
ISO 9001:2025
International standard defining the requirements for a Quality Management System (QMS), focused on process control, traceability and continuous improvement.
Conflict Minerals
Compliance with international regulations on traceability and responsible sourcing of critical minerals (3TG).
SMT Certified Lab
Certification attesting controlled competence and validated processes in surface-mount assembly and soldering of electronic components onto PCBs, ensuring manufacturing reliability, repeatability and quality consistency.
MID Certified Energy Meters
European Directive regulating measuring instruments intended for legally relevant applications (e.g. energy billing).
LoRaWAN
Low-power wide-area network (LPWAN) communication protocol designed for long-range wireless transmission of small data packets between IoT devices and network infrastructure.
Can in Automation
International industry association that develops and maintains technical standards and specifications for CAN-based communication protocols used in industrial and embedded systems.
A technical timeline
Herholdt Controls is founded in Milan by Hans Herholdt. Initial focus on electrical control devices.
First analogue energy meter range. Entry into metering sector.
Transition to digital metering platforms with microcontroller-based architecture.
First MID certification for energy meters.
Introduction of modular communication systems.
First meter with integrated communication stack.
Integration into Hager.
Expansion of Hager range and development of dedicated OEM platforms.
30th anniversary and integration into Business Unit Hager Energy.
Integrated CAN and CANopen communication.
LoRaWAN module introduction.
Alignment with latest MID evolution. Introduction of IP Meter and DC Meter solutions.
Get in touch
Whether you have a technical question, need support for a specific project, or are interested in partnering with us on a tailored solution, we'd be glad to hear from you.
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