On 20 May 2026, the Directorate for Standards, Metrology and Quality of Vietnam (STAMEQ) officially issued the Detailed Implementation Rules for VR-MARK Type Approval of Industrial Sensors (QCVN 126:2026/BKHCN), clearly stipulating that full enforcement will begin on 1 June 2026. This policy will directly affect the market access mechanism for pressure, temperature, and flow industrial sensors in the Vietnamese market, marking Vietnam’s regulation of key industrial measurement equipment as entering a new stage of localized compliance. The core of the policy adjustment lies in the mandatory requirement for a locally authorized representative and a type test report issued by the Vietnam National Institute of Metrology (VNIAM) or its recognized laboratories, bringing an end to the previous transitional arrangement under which CE/IEC reports were accepted, and posing a substantive test to the supply chain responsiveness of Chinese export enterprises.

Event Overview

On 20 May 2026, the Directorate for Standards, Metrology and Quality of Vietnam (STAMEQ) officially issued the Detailed Implementation Rules for VR-MARK Type Approval of Industrial Sensors (QCVN 126:2026/BKHCN), making it clear that from 1 June 2026 onward, all pressure, temperature, and flow industrial sensors entering the Vietnamese market must appoint a Vietnamese local legal entity as the authorized representative and submit a type test report issued by the Vietnam National Institute of Metrology (VNIAM) or its recognized laboratories. The previous transition period during which only CE/IEC reports were accepted has ended. Chinese manufacturers without a local partner will be unable to complete registration and customs clearance.

Which Market Segments Will Be Affected

Direct trading enterprises: As the main exporters of the products, they must complete VR-MARK registration filing before customs clearance, and the precondition for registration is to designate a Vietnamese local legal entity as the authorized representative and provide a VNIAM-recognized type test report. This means the original “export upon delivery” model is no longer sustainable. Companies must begin negotiations with local agents and testing schedule arrangements 6–12 months in advance, otherwise they will face risks such as containers being held at port, return shipment, or interruption of market access.

Raw material procurement enterprises: Some companies import core sensor components (such as MEMS pressure dies and platinum resistance temperature-sensitive elements) for complete machine assembly. Although the new regulation does not directly cover the component level, if downstream equipment manufacturers are denied market entry due to VR-MARK non-compliance, the impact will be transmitted upstream to the stability of procurement orders——especially when procurement contracts stipulate “compliance with target market access requirements”, component suppliers may be required to provide supporting technical documents or participate collaboratively in type testing, indirectly increasing procurement management costs and compliance-related liability.

Processing and manufacturing enterprises: Manufacturers supplying the Vietnamese market under private label (OEM/ODM) or their own brands must simultaneously assume obligations as the product liability entity. In addition to appointing a local representative, they must also ensure that the sensor models used have passed type testing under the VNIAM system——if the same model has differences in structure, materials, or software across different production lines or batches, retesting may be required. Quality consistency control at the manufacturing end, BOM traceability, and localization adaptation of design documents (such as Vietnamese labels and manuals) become mandatory supporting items.

Supply chain service enterprises: Including certification consulting agencies, testing laboratory agents, customs declaration service providers, etc. Their business focus is rapidly shifting from “CE consulting” to “full-cycle VR-MARK agency services”, but the current number of Vietnamese local laboratories with VNIAM-recognized qualifications is limited, and queue times generally reach 8–14 weeks; at the same time, local Vietnamese legal entity representative resources are scarce and service standards have not yet been unified, leading to prominent issues such as obvious agency fee premiums and unclear contractual rights and responsibilities, while the divergence in service capabilities is intensifying.

Key Focus Areas and Response Measures for Relevant Enterprises or Practitioners

Confirm whether the product falls within the scope of QCVN 126:2026

Not all sensors are subject to this regulation: the rules clearly limit it to “pressure, temperature, and flow measuring equipment used in industrial process control, energy metering, safety interlocking, and similar scenarios”, with priority inclusion for those with an accuracy grade ≥0.5 or involving explosion-proof or SIL certification requirements. Enterprises must verify item by item against the product classification table and technical thresholds in Annex A to avoid resource misallocation caused by misjudgment.

Assess the feasibility and legal risks of cooperation with a local authorized representative

Vietnamese law does not stipulate that the authorized representative must be a wholly foreign-owned company; joint ventures and trading companies holding valid business licenses may also serve in this role, but an entrustment agreement with legal effect under Vietnamese jurisdiction must be signed. Special attention should be paid to reviewing the representative’s past VR-MARK cases and tax and compliance records, and responsibility boundaries should be clearly agreed upon (such as compensation mechanisms if registration fails due to operational errors by the representative). It is not advisable to rely only on verbal promises or generic template contracts.

Initiate pre-communication with VNIAM-recognized laboratories and plan sample submission for testing

The VNIAM official website has published a first batch list of 7 recognized laboratories (including 3 each in Hanoi and Ho Chi Minh City, and 1 in Da Nang), but only 2 currently have full-parameter flow sensor testing capability. It is recommended that enterprises complete the preliminary review of technical documentation by the end of May 2026 (including Vietnamese versions of specifications, circuit diagrams, and calibration methods), and reserve at least 3 rounds for sample iteration windows——the first sample is often returned because interface protocols and environmental adaptability testing are not fully covered.

Simultaneously review existing contracts and after-sales clauses with Vietnamese customers

Some long-term cooperation agreements do not stipulate a “cost-sharing mechanism for compliance costs caused by regulatory changes”. After the new regulation takes effect, if equipment cannot be put into operation due to the absence of VR-MARK, this may trigger claims for breach of contract. It is recommended to complete a review of key customer contracts before June and supplement written agreements regarding the allocation of certification responsibilities, update cycles, document provision obligations, and other matters, so as to reduce potential commercial disputes.

Editorial Viewpoint / Industry Observation

Observably, this is not merely a technical certification upgrade but a structural shift in Vietnam’s industrial market governance logic — moving from ‘recognition of foreign conformity’ toward ‘localized accountability and traceability’. Analysis shows that STAMEQ’s emphasis on domestic legal entity representation reflects broader ASEAN trends (e.g., Thailand TISI’s local representative rule for IoT devices), where regulatory capacity building is paired with import control tightening. From an industry perspective, the bottleneck is less about testing capability than about institutional coordination: VNIAM’s current reporting system does not interlink with Vietnam’s national customs database, causing delays in registration status verification. This gap makes real-time compliance tracking difficult — a point more critical for just-in-time manufacturing models.

Conclusion

The implementation of the VR-MARK rules is essentially an important signal that Vietnam is bringing industrial sensors into the regulatory framework for ‘supporting equipment for critical infrastructure’. It is neither a short-term trade barrier nor merely a technical threshold, but rather a systematic test of exporters’ depth of localized operations, speed of compliance response, and cross-jurisdictional coordination capability. Rationally speaking, enterprises that take the lead in establishing a local representative network in Vietnam and mastering the VNIAM testing timeline will gain a significant market access advantage in the second half of 2026; manufacturers that still rely on transitional-period operating inertia may face structural concessions in market share. In the long run, this mechanism is better understood as Vietnam’s proactive screening mechanism for upstream supply chains of highly reliable components during its manufacturing upgrade process.

Information Source Notes

Official document sources: announcement on the official website of the Directorate for Standards, Metrology and Quality of Vietnam (STAMEQ) (No.: 126/QD-STAMEQ, issue date: 20 May 2026); full text of QCVN 126:2026/BKHCN (Vietnamese version); directory of recognized laboratories of the Vietnam National Institute of Metrology (VNIAM) (updated in May 2026). Matters for continued observation: whether STAMEQ will establish simplified procedures for small-batch imports; whether VNIAM will open a pilot program for Remote Witness Testing; and whether Vietnam’s Ministry of Industry and Trade will subsequently expand VR-MARK to other sensor types such as level and position sensors.