Authorization of Measuring Instruments and Systems: The Interaction of EAC and PAC

Exporting industrial measuring instruments, flow meters, sensors, test benches, and electronic monitoring devices to the Eurasian Economic Union (Russia, Belarus, Kazakhstan, Armenia, and Kyrgyzstan) involves two fundamentally distinct regulatory systems:

  1. Safety Conformity Assessment (EAC): Confirms electrical safety, electromagnetic compatibility, RoHS compliance, and explosion safety. It applies uniformly across the EAEU customs territory.
  2. Metrological Pattern Approval (Pattern Approval Certificate – PAC): Verifies metrological accuracy, tolerance classes, and calibration capability for instruments used in state-regulated spheres. This process is strictly national.

A measuring instrument may possess a valid EAC certificate and yet remain legally prohibited from operation in refineries, power generation facilities, or utility networks if the requisite national metrological approval is missing.

EAC certification and pattern approval of measuring instruments

The Stalled EAEU Regulation: Why Metrology Remains National

Critical Notice for Exporteure: No Supranational EAC Metrology Standard

A draft Technical Regulation entitled "On the safety of measuring instruments" (TR EAEU) was originally designed to establish a unified Union-wide pattern approval and verification system.

Reality: This draft has been politically deadlocked for years and remains unadopted. National regulatory bodies (Rosstandart in Russia, KazStandard in Kazakhstan, Gosstandart in Belarus) have failed to reach consensus due to:

  • Lack of Mutual Trust in Test Data: Member states reject automatic mutual recognition of type evaluations and calibration protocols without national re-examination.
  • Protection of National Verification Markets: State verification institutes resist relinquishing authority and fee revenues to a centralized body.
  • Discrepancies in Measurement Legislation: National laws governing the uniformity of measurements differ significantly regarding testing intervals, maximum permissible errors, and liability regimes.

Implication for Manufacturers: Avoid misleading claims regarding an "all-inclusive Union-wide EAC metrology certificate." Operating measuring equipment in state-regulated sectors in Russia, Kazakhstan, or Belarus requires separate national Pattern Approval procedures (PAC) in each target country.

EAEU Recognition Rules: Decision No. 83/2026 and Third-Country Equipment

EEC Council Decision No. 145 of October 18, 2016 establishes mutual recognition rules for metrological work across the Union, significantly revised by Decision No. 83 of July 9, 2026 (effective since September 13, 2026) regarding calibration workflows.

For European manufacturers, Clause 5 of these Recognition Rules is decisive: Simplified mutual recognition applies solely to measuring instruments manufactured within the territory of EAEU member states.

Exclusion of Third-Country Equipment: For instruments manufactured in Germany, Italy, Switzerland, or other non-EAEU states, automatic recognition of a Russian approval in Kazakhstan or Belarus is legally excluded. Pattern approvals for third-country goods must be processed under the national laws of each destination state.

Pillar 1: EAC Conformity Assessment under Technical Regulations (EAEU)

Before any measuring device is placed on the EAEU market, its basic constructional safety must be verified. Industrial measuring instruments commonly fall under the following scopes:

TR CU 004/2011 (Low Voltage)

Applies to electrical measuring and control instruments with rated voltages of 50–1,000 V AC or 75–1,500 V DC. Verifies insulation resistance, electrical shock protection, and thermal limits. Pure 24 V DC sensors operating without internal power supplies fall outside TR 004.

TR CU 020/2011 (EMC)

Mandatory for all active electronic measuring devices, transmitters, and sensors. Evaluates suppression of electromagnetic emissions and immunity against high-frequency fields, surge pulses, and electrostatic discharges (ESD).

TR EAEU 037/2016 (RoHS)

Restricts hazardous substances (lead, cadmium, mercury, hexavalent chromium, flame retardants, phthalates) in electrical equipment. Conformity for industrial measurement instruments is typically verified through an EAC Declaration.

TR CU 012/2011 (ATEX / Ex)

Mandatory for sensors, flow meters, and gas analyzers installed in potentially explosive gas or dust environments. Strictly requires an EAC Ex Certificate (including mandatory manufacturing audits for serial production).

Procedural Option for Industrial Equipment:
Standard low-voltage, EMC, and RoHS devices primarily fall under the EAC Declaration route (Schemes 1d, 3d, 4d, 6d). Upon written request by the manufacturer, the declaration can be voluntarily replaced by an EAC Certificate (Schemes 1c, 3c), which is frequently demanded in public tenders and EPC oil & gas projects.

Representative Equipment Covered:

  • Ammeters, voltmeters, wattmeters, and grid analyzers;
  • Ohmmeters, insulation meters, and conductivity meters;
  • Level sensors, ultrasonic transducers, and radar level gauges;
  • Pressure transmitters, differential pressure transducers, and mechanical manometers;
  • Industrial temperature probes (Pt100, thermocouples, optical pyrometers);
  • Gas chromatographs, mass flow meters, and hazardous gas detectors.

The Metrological Pattern Approval (Russian: Утверждение типа средств измерений, Pattern Approval Certificate – PAC) is the statutory procedure confirming that a measuring instrument type complies with mandatory metrological standards, satisfies its stated accuracy classes, and ensures unbroken traceability.

Metrological pattern approval certificate PAC

When Is Metrological Pattern Approval (PAC) Legally Mandatory?

A pattern approval is required whenever measurements occur within legally regulated spheres (legal metrology):

  • Safety at Hazardous Production Facilities (OPO): Measurements within chemical plants, gas pipelines, refineries, and mining installations;
  • Commercial Custody Transfer (Fiscal Metering): Volume and energy measurement of natural gas, crude oil, district heating, water, and electricity;
  • Occupational Health and Safety: Workstation air monitoring, toxic gas detection, noise, and vibration analysis;
  • Healthcare and Medical Technology: Diagnostic and therapeutic devices delivering quantitative measurements (governed in Russia by Order No. 257n);
  • Environmental Protection: Continuous emission monitoring systems (CEMS) and industrial effluent discharge tracking;
  • Geodesy, Cartography, and Traffic Enforcement: Certified radar speed meters and geodetic surveying instruments.
Voluntary Metrological Certification: Instruments deployed outside state-regulated areas (e.g., internal laboratory R&D or non-critical process indicators) may undergo voluntary metrological assessment to build trust with enterprise clients, though this cannot replace statutory approval where mandated by law.

System Boundaries: Sensor vs. Transmitter vs. Complete Measuring System

In process automation, defining the metrological system boundary determines whether components are approved individually or as an integrated system (Russian: Измерительная система – ИС):

  • Standard Sensor / Transmitter: Converts a physical quantity (pressure, temperature) into a standardized signal (4–20 mA, HART, Modbus). The transmitter is approved as an independent type.
  • Integrated Measuring Chain / System (e.g., Gas Metering Skid, Flow Computer): When multiple sensors (pressure, temperature, differential pressure) connect to a flow computer that calculates standardized volume flows, approving individual sensors is insufficient. The complete measuring chain and calculation algorithm must be registered as a unified measuring system.

Schmidt & Schmidt evaluates your P&ID diagrams and process flowcharts prior to testing to define the precise system boundary and prevent costly re-testing.

Measuring system integration and metrology

Metrological Software, Firmware, and Data Integrity

In digital instruments, firmware constitutes an integral part of the approved type. In accordance with international guidelines (e.g., OIML D 31 / WELMEC) and national regulations, software undergoes rigorous evaluation:

  • Software Separation: Metrologically relevant software (raw data capture, calibration coefficients, scaling algorithms) must be separated from general user interfaces and communication modules.
  • Identification: The exact software version number and digital checksum (CRC / Hash) are bound to the certificate and type description.
  • Tamper Protection: Prevention of unauthorized parameter modification via hardware switches, physical seals, or multi-level password access logging.

National Frameworks: Russia, Kazakhstan, and Belarus

Measuring instrument type approval mark in Russia

Russian Federation

Legal Basis: Federal Law No. 102-FZ "On ensuring the uniformity of measurements" and Minpromtorg Order No. 2905 (as amended by Order No. 3334/2026).

Authority: Rosstandart. Statutory review window: up to 30 business days following application registration.

Digital Registration: Following testing at an accredited metrology institute (VNIIMS, VNIIFTRI, VNIIM), approvals are entered in FGIS "ARSHIN".

Marking: Instruments bear the official state metrological mark "СТ".

Measuring instrument mark Kazakhstan

Republic of Kazakhstan

Legal Basis: Law No. 53-II "On ensuring the uniformity of measurements" (Articles 17 & 19).

Authority: KazStandard.

Procedures: 5-year serial pattern approval or project-specific metrological attestation for single installations.

Marking: Approved devices receive the Kazakh metrological mark and are entered into the national registry.

Measuring instrument mark Belarus STB

Republic of Belarus

Legal Basis: Law No. 3848-XII "On ensuring the uniformity of measurements".

Authority: Gosstandart / BelGIM.

Validity & Audit: Serial approvals are valid for 5 years. Foreign manufacturing sites require mandatory on-site audits.

Marking: Instruments are marked with the national metrological mark "СТБ".

Step-by-Step Pattern Approval Procedure (PAC)

The metrological type approval process involves the following technical stages:

  1. Classification & Scope Review: Defining measurement parameters, error limits, and environmental ranges; selecting an accredited state metrology institute.
  2. Program & Verification Methodology Development: Developing the formal testing program (Программа испытаний) and statutory verification methodology (Методика поверки – МП).
  3. Customs Clearance & Metrological Laboratory Testing: Legal temporary importation of test samples; assessing measurement uncertainty, linearity, drift, and EMC stability in the metrology lab.
  4. On-Site Manufacturing Audit (Serial Approval): Evaluating factory calibration benches, reference standards, and quality controls by authorized metrologists.
  5. Evaluation & Official Approval: Compiling the expert report and statutory Type Description (Описание типа). The state agency (e.g., Rosstandart) issues the approval decree.
  6. State Register Entry: Assigning the registration number and publishing data in the national registry (e.g., FGIS "ARSHIN").

Initial Verification (Poverka) and Periodic In-Service Testing

Every individual instrument intended for use in regulated sectors must undergo initial verification (Russian: Первичная поверка). This confirms that the specific serial number matches the approved type.

The Digital Verification Regime (FGIS "ARSHIN" in Russia):
Under Federal Law No. 496-FZ, paper verification certificates have been eliminated as primary legal proof. Verification gains legal force solely upon electronic record creation in the state information system FGIS "ARSHIN". Paper documents serve merely as optional extracts.

During plant operation, instruments must undergo periodic reverification (Russian: Периодическая поверка) at specified calibration intervals (e.g., every 1 to 5 years, as defined in the Type Description).

Initial verification and testing in Russia

Validity Period and Manufactured Base Protection

The legal effect of certificate expiration is often misunderstood:

Statutory Rule under Minpromtorg Order No. 2905 (Annex 2, Clause 7):
Serial Pattern Approval Certificates are issued for 5 years. This 5-year validity period restricts only the timeframe during which new instruments may be manufactured.

Instruments manufactured and initially verified while the serial PAC was valid may remain in lawful operation, undergo maintenance, and be reverified throughout their entire operational life (e.g., 10, 15, or 20 years)—even if the type approval for subsequent factory production is not extended.

To continue manufacturing and importing new batches after 5 years, an extension of the pattern approval for another 5 years must be filed. Applications should be submitted three to four months prior to expiration, provided no technical changes have been made to the instrument design.

Mandatory Technical Documentation

All dossiers for EAC assessment and national metrological approval must be submitted in the Russian language (and the destination country's state language, where required):

  • Detailed functional descriptions, model matrices, and nomenclature codes;
  • Technical Passport (PS) compliant with GOST 2.601 / GOST 2.610 (including verification recording tables);
  • Operating Manual (RE) with assembly, mounting, calibration, and maintenance procedures;
  • Draft Verification Procedure (Методика поверки – МП);
  • Software documentation (version identifiers, checksums, protection architecture);
  • Factory Acceptance Test (FAT) records and factory calibration certificates;
  • Wiring schematics, terminal connection plans, and functional block diagrams;
  • Functional safety documentation (SIL), material certificates for pressure parts (TR CU 032);
  • Where applicable: Valid certificates under TR CU 012/2011 (ATEX/Ex) or Medical Device Registrations.

The Authorised Representative in the Approval Process

Authorised representative in the EAEU

Foreign manufacturers without a registered legal entity within the EAEU customs territory cannot independently file EAC declarations or initiate applications with national metrology agencies. Appointing an Authorised Representative established within an EAEU member state is an express legal obligation.

Schmidt & Schmidt acts as an independent Authorized Representative. All intellectual property, approval titles, and registry entries remain under your ownership, eliminating dependency on local distributors.

Sanctions Compliance for Instrumentation and Automation Equipment

Industrial instrumentation, hydrocarbon flow meters, high-precision pressure gauges, vibration sensors, and process controllers face stringent sanctions restrictions imposed by the European Union (Regulation (EU) No 833/2014) and the United States. Many measuring instruments are listed in Annex VII (Dual-Use goods) or Annex XXIII (Industrial goods embargo).

Transactions with designated entities in the oil, gas, chemical, or energy sectors, as well as dealings with sanctioned financial institutions (SDN List), are prohibited. Every project requires rigorous end-use and end-user verification.

Legal Security via Kazakhstan: Schmidt & Schmidt operates corporate offices in Almaty and Astana. As a founding EAEU member state, Kazakhstan maintains an advanced metrological infrastructure (KazStandard) and issues Union-wide EAC certificates. We enable European manufacturers to carry out testing, certification, and project execution in full compliance with Western export control laws.

Further reading: EAC Certification and Metrology within the Context of International Sanctions.

Sanctions screening for measuring equipment

Timelines, Costs, and Document Delivery

Lead times and costs for metrological and technical safety approval depend on the chosen pathway:

  • EAC Declaration (EMC / LVD / RoHS): Lead time approx. 1 to 2 weeks.
  • EAC Ex Certificate under TR CU 012/2011: Lead time approx. 6 to 9 weeks (including testing and audit).
  • Metrological Pattern Approval (PAC): Lead time approx. 3 to 6 months (due to comprehensive testing, verification methodology approval, and agency review).
  • Validity Period: EAC certificates and PAC approvals for serial production are valid for 5 years. An extension for another 5 years is possible if filed on time prior to expiration without underlying design modifications.
Upon approval, you immediately receive electronic confirmations and registry links (e.g., FGIS "ARSHIN"). Official paper certificates printed on anti-counterfeiting security paper are securely delivered directly to your corporate address via international express courier.

How Does Measuring Instrument Authorization Work with Schmidt & Schmidt?

We manage the entire conformity assessment and legal metrology workflow end-to-end:

01 Classification & Strategy

We review your measuring equipment, assign HS codes, and determine applicable Technical Regulations (004, 020, 037, 012) and national metrology mandates.

02 GOST-Compliant Documentation

Our engineers draft the Technical Passport (PS) and Operating Manual (RE), and coordinate the Verification Methodology (Методика поверки) with the metrology institute.

03 Sample Import & Testing

We manage the temporary import of test samples and oversee accuracy, environmental, and EMC trials in accredited laboratories.

04 Factory Audit

For serial approvals, we organize the mandatory on-site manufacturing audit at the production facility with authorized metrologists.

05 Registration & ARSHIN Entry

We manage approval proceedings with state agencies (Rosstandart, KazStandard, Gosstandart) up to registration in the state measurement registers.

06 Delivery & Verification

You receive the original certificates via courier. Where required, we coordinate initial verification (Poverka records) for specific commercial shipments.

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