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.
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.
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.
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.
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
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.
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.
✔ 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
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.
NMi has a long good worldwide reputation due to hard work, dedication and good customer service. We guide our clients, help them and learn from each other. Every market is different and every service needs to be approached in another way.
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