Smart meters are the future!
Results count! Smart watt-hour meters, gas meters and water meters all rely on accuracy.

Electricity meters

NMi offers a wide range of testing for electricity meters. Our core business is testing in accordance with the IEC 62052 / 62053 series, for active and reactive energy, as well as for European harmonised standards EN 50470, which is the basis for MID approvals. Many other services are available as well. For example, testing in accordance with the new safety standard 62052-31, the OIML R 46, durability examination or 2-150 kHz testing. If likely we can also test for specific markets, such as Australia or South-Africa and apply the local requirements. With dedicated experts in international working groups like IEC and CENELEC TC 13, WELMEC 11 and OIML TC 12, NMi is your partner in testing electricity meters.

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

Gas meters can be based on a number of different measuring principles, for residential or industrial applications. NMi is able to test every gas meter based on the applicable EN standard, like the EN 1359 (diaphragm meters), EN 14236 (ultrasonic meters), EN 12480 (rotary meters), EN 12261 (turbine meters) as well as the draft CEN standard for thermal meters. Also, volume conversion devices can be examined, as well as gas chromatographs and pressure or temperature transmitters. As OIML issuing authority, NMi offers testing of gas meters in accordance with the OIML R 137 as well. Here you can make use of the OIML Certification System for quick international acceptance. As one of the leading Notified Bodies, NMi can help you with the certification of your gas meter. By participating in international working groups, like WELMEC 11 and OIML TC 8, NMi is able to provide you with the best knowledge in the field of gas metering.

Water and heat meters

NMi offers certification of your water or heat meter. Water meters can be examined in accordance with OIML R 49 or ISO 4064. Heat meters can be tested based on the OIML R 75 or the EN 1434. As a Notified Body, NMi is able to issue your MID approval. The OIML Certificates of Conformity can be used directly in the OIML Certification System. This is a real help in gaining international recognition, in order to attain approvals in countries all over the world. Due to its participation in WELMEC 13, NMi can always provide you with the most up-to-date information.

Power quality

NMi can test power quality meters in accordance with the IEC standard 61000-4-30 Edition 3. The investigation is performed using the test methods described in IEC 62586-2. The certificate and test reports, issued under an ISO 17025 accreditation, guarantee good market acceptance. A new service is the examination of PMD’s (performance measuring and monitoring devices) in accordance with the IEC 61557-12. These devices can be tested for various parameters, such as voltage and frequency, but also for active and reactive power and energy as well as for power quality aspects. With dedicated experts in IEC TC 85, NMi can advise you to choose the most suitable testing options.

Communication, data security and penetration testing

Recently, NMi opened a dedicated laboratory for testing smart meters and smart meter gateways (SMGW) in Merseburg, Germany. This lab is also specialised in data security and penetration testing. Smart meters and communication systems can be examined in accordance with the CEN/CENELEC/ETSI document “Minimum security requirements for AMI (Advanced Metering Infrastructure) components”, prepared by ESMIG. More details are set out in our dedicated  flyer.

In addition, our specialists are able to perform source code reviews to identify possible vulnerabilities. This allows them to estimate the code quality and to reduce risks. These code reviews are performed on site, on a manufacturer’s premises.

Training and education

Do you have a need for training related to (legal) metrology for your utility meter? Or do you want to have an (in-house) training by dedicated experts? Feel free to contact us to discuss your wishes. Also a training to prepare yourself for MID module D can be arranged, if required followed by a pre-audit. Send an e-mail to nmi@nmi.nl in order to find out the possibilities.

Sharmila Kristalijn

Sr. Account Manager



Knowledge and experience in metrology!

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  • Customer Orientated
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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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