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Herholdt Controls

Where your drawings end up: ISO/IEC 27001 at a company that manufactures energy meters in Milan

Herholdt Controls is ISO/IEC 27001 certified. Discover how our Milan site manages information security for OEM drawings, firmware and commercial data.

Five questions to ask your metering supplier before approving an OEM project

Where is it manufactured? Who writes the firmware? Who responds when something changes? Five questions to understand what you are really buying.

Supply continuity for OEMs: why the lowest price is not enough

How to assess lead times, stock, production capacity and alternative sources to reduce the risk of production line stoppages in OEM projects.

Who still manufactures energy meters in Europe?

Discover why meter manufacturing location matters for MID, NIS2 and the CRA, and what OEMs should verify before choosing a metering partner.

From four to three DIN modules: what had to be redesigned for a compact three-phase MID meter

From four to three DIN modules: dimensions, cable layout, terminals, ergonomics. The technical choices behind the new compact generation of the M3PRO line.

Corporate Cybersecurity: what it means to be a NIS2 Important Entity for an electrical equipment manufacturer

ACN classification, NIST framework, SOC and SIEM, Incident Response Plan: the cybersecurity posture of a supplier of strategic electrical equipment.

Cybersecurity for an industrial meter: what changes by December 2027

Cyber Resilience Act, RED 2014/53, IEC 62443: the regulatory framework that will change by December 2027 for those who design and purchase connected meters.

The Firmware Architecture of a Meter: four levels of customization, one word used for all of them

Configuration, mapping, application customization or metrological co-engineering: four levels of firmware intervention in an OEM meter.

DC and Bidirectional Measurement in Energy Meters: where the architecture inherited from AC breaks down

Four quadrants, low-current offset, Eichrecht and timestamping: the meter architecture changes when energy flow changes direction.

Current Sensors in Energy Meters: Shunt, CT, Rogowski, Hall Effect. Why the measurement front end defines the entire design

Shunt, CT, Rogowski coil or Hall effect: current sensor choice defines accuracy, bandwidth and product lifetime in energy meters.