Utilities

Results Matter! Ensuring Accuracy Across Utility Meters

From smart watt-hour meters to gas and water meters, precision is critical. At NMi, we provide comprehensive testing and certification services to ensure compliance with global metering standards, helping manufacturers achieve regulatory approval in key markets.

Our expertise covers electricity, gas, water, and heat meters, as well as power quality and communication security testing. With a dedicated team of experts actively involved in IEC, CENELEC, WELMEC, OIML, and ANSI standards development, NMi stays ahead of regulatory changes, offering industry-leading testing services.

Electricity meters– Now Including ANSI C12.32 Certification for DC Meters

At NMi, we provide extensive testing for electricity meters, verifying compliance of European and international standards.

AC and DC Meter Testing Services:
IEC 62052 / 62053 series – Active and reactive energy metering
EN 50470 – European harmonized standards for MID approvals
OIML R 46 – International metering standard for legal metrology
IEC 62052-31 – The latest safety standard for electricity meters
ANSI C12.32 [2021] – The North American standard for DC electricity meters, ensuring revenue-grade accuracy up to 1,500 V DC

With DC power applications growing in renewables, energy storage, and EV charging, compliance with ANSI C12.32 is critical for North AMerican market entry. By offering IEC, EN, and ANSI testing under one provider, NMi simplifies global compliance for manufacturers.

Additionally, we can test for specific market requirements, including Australia and South Africa, applying local regulations as needed.

Interested in receiving the latest news on upcoming changes in IEC and CENELEC standards and their impact? Feel free to download our white paper.

Gas meters

Our gas meter testing covers all meter types, including:
Diaphragm, ultrasonic, rotary, and turbine meters
Compliance with EN 1359, EN 14236, and OIML R 137
International certification through the OIML Certification System

With participation in WELMEC 11 and OIML TC 8, our experts stay at the forefront of global gas metering standards.

Water and heat meters

NMi supports residential and industrial water and heat meters, ensuring compliance with:
OIML R 49 and ISO 4064 for water meters
OIML R 75 and EN 1434 for heat meters

As a Notified Body, we issue MID approvals, streamlining the international certification process.

Power quality

Ensuring power quality and reliability is essential for grid operators and consumers. Our testing covers:
IEC 61000-4-30 Edition 3 – Compliance for power quality meters
IEC 62586-2 – Performance measuring and monitoring device (PMD) testing
Voltage, frequency, power, and energy measurement verification

Communication, data security and penetration testing

Smart meters require robust cybersecurity to protect sensitive data. NMi provides:
Data security and penetration testing based on CEN/CENELEC/ETSI standards
Source code reviews to identify vulnerabilities and enhance software security

Our on-site testing ensures manufacturers can meet evolving cybersecurity and communication protocols.

More details are set out in our dedicated  flyer.

Training and education

NMi offers expert-led training in legal metrology and utility meter certification, including:
MID Module D and pre-audit preparation
Tailored training for manufacturers, utilities, and regulators

Sessions can be conducted on-site or in-house, providing practical guidance on compliance and market entry.

Why Choose NMi?

One provider for multi-market compliance – Covering IEC, EN, OIML, and ANSI standards
Faster market entry – Minimize redundant testing and reduce approval timelines
Trusted expertise – Active participation in IEC, CENELEC, WELMEC, OIML, and ANSI standardization committees
ISO 17025 accreditation process underway – Ensuring independent, high-quality testing

Let’s Simplify Your Compliance Journey

Whether you need Type Approval, MID certification, OIML compliance, or ANSI C12.32 certification for DC meters, NMi is your trusted partner.

Contact us at nmi@nmi.nl to explore how we can support your utility metering needs.

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