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CE Marking: A Step‑by‑Step Guide for Manufacturers

  • Published on Friday, January 23, 2026
 

CE Marking and Global Product Compliance Testing Services

 

Placing a product on the European market requires more than good engineering, it requires documented evidence that the product meets the applicable EU health, safety, and performance requirements. CE marking is the mandatory conformity marking that communicates this compliance to regulators and buyers across the EEA. As an ISO/IEC 17025 accredited testing laboratory, Stancer provides the testing, technical documentation, and engineering support manufacturers need to achieve CE marking efficiently and correctly. For manufacturers targeting multiple markets simultaneously, we also support UKCA, FCC/IC, VCCI, and other global certifications.

 

What Is CE Marking?

The Legal Foundation of EU Market Access

CE marking is not a quality mark and it is not a certificate issued by a third party. It is a manufacturer’s declaration, a legally binding statement that the product meets all applicable EU directives and regulations before it enters the EEA market. EU market access is conditional on this conformity assessment being completed correctly; the marking is affixed by the manufacturer (or their authorized representative), not by a testing laboratory or certification body.

 

Two core obligations underpin the legal framework. The manufacturer must produce an EU Declaration of Conformity (DoC) a document that identifies the product, the applicable directives and harmonized standards, and the year of first affixation. The manufacturer must also compile and maintain a Technical File: the complete body of evidence, design documents, drawings, component lists, risk assessments, test reports, and instruction manuals, that substantiates the CE marking claim. The Technical File does not need to be submitted to any authority proactively, but it must be made available to market surveillance authorities on request.

 

The CE mark itself must be at least 5mm in height, legible and indelible, and must appear on the product (and, where applicable, on packaging and accompanying documents). Where a Notified Body has been involved in a conformity assessment procedure as is required for certain product categories the Notified Body’s four-digit identification number must appear directly after the CE mark.

 

Which Products Require CE Marking?

Product Categories Subject to EU Directives

CE marking applies across a wide range of product categories:

 

Many products fall under more than one directive. A wireless industrial sensor, for example, may be subject to the Radio Equipment Directive, the EMC Directive, and the Low Voltage Directive at the same time. Correctly identifying the full set of applicable directives is the starting point for every CE marking project, and where errors are most commonly made.

 

CE Marking vs. UKCA; Understanding the Post-Brexit Divide

The UKCA (UK Conformity Assessed) marking was introduced following the UK’s departure from the EU. Designated from 1 January 2021, the transition away from EU marking acceptance in Great Britain was phased by product category over the following years. Northern Ireland remains subject to CE marking requirements under the Windsor Framework.

 

UKCA requirements closely mirror CE marking in most technical areas, but they are legally distinct frameworks. The EU conformity marking covers EU member states and the broader EEA; UKCA covers Great Britain only. Notified Bodies under the EU regime are EU-designated; UK Approved Bodies are separately recognized under UKCA. Manufacturers should confirm the current UKCA requirements and any applicable transition provisions for their product type, as timelines have differed across categories.

 

Stancer testing-lab supports both CE and UKCA marking projects, and in many cases can structure a test program so that evidence generated for one marking supports the other.

 

EU Directives and Regulations We Test Against

The EU’s product regulatory framework is organized around directives and regulations, each covering specific product categories and essential requirements. Stancer Testing-Lab tests against all of the following. Determining the applicable set is the first step in every project.

 

Low Voltage Directive (LVD) 2014/35/EU: covers electrical equipment designed for use within voltage ranges of 50–1000V AC or 75–1500V DC. The Directive’s essential requirements address electrical safety, shock, fire, mechanical hazard , and apply to a broad range of equipment from power tools to laboratory instruments. Testing is performed against harmonized EN standards such as EN 62368-1, EN 61010-1, and others depending on product type.

 

EMC Directive 2014/30/EU: applies to all electrical and electronic equipment and addresses both electromagnetic emissions (the extent to which equipment generates interference) and immunity (the extent to which equipment withstands interference from other sources). The EMC Directive covers equipment not already addressed by RED’s Article 3.1b provisions.

 

Radio Equipment Directive (RED) 2014/53/EU: replaced the R&TTE Directive and applies to all products that intentionally transmit or receive radio waves. It introduces three essential requirements: Article 3.1a (health and safety, assessed against LVD-equivalent standards), Article 3.1b (electromagnetic compatibility), and Article 3.2 (effective use of the radio spectrum). A wide range of harmonized ETSI EN standards applies depending on the radio technology involved.

 

Machinery Regulation (EU) 2023/1230: replaces the Machinery Directive 2006/42/EC and applies from 20 January 2027. The Regulation retains the fundamental approach of the Directive while introducing updates for software, autonomous machinery, and safety functions. Machinery placed on the market before the application date under the existing Directive remains compliant under its original framework.

 

Medical Device Regulation (MDR) 2017/745/EU: applies to medical devices and establishes classification-based conformity assessment routes. For in-vitro diagnostic devices, the parallel IVD Regulation 2017/746/EU applies. Both MDR and IVDR require Notified Body involvement for most device classes.

 

ATEX Directive 2014/34/EU: covers equipment and protective systems intended for use in potentially explosive atmospheres. Conformity assessment under ATEX typically requires Notified Body involvement for equipment in higher equipment groups.

 

RoHS Directive 2011/65/EU (RoHS 2): restricts the use of specific hazardous substances, including lead, mercury, cadmium, and certain flame retardants, in electrical and electronic equipment. RoHS compliance is documented in the Technical File and is not typically tested in a laboratory; it relies on material declarations and supply chain data.

 

General Product Safety Regulation (GPSR) 2023/988: became fully applicable on December 13, 2024, replacing the General Product Safety Directive. GPSR introduces strengthened obligations for manufacturers and online marketplaces and applies to consumer products not covered by specific sector legislation.

 

Ecodesign for Sustainable Products Regulation (ESPR): expands the ecodesign framework beyond energy-related products to cover a wider range of product categories, with delegated regulations being developed progressively.

 

Cyber Resilience Act (CRA): introduces cybersecurity requirements for products with digital elements. Obligations under the CRA apply from December 11, 2027, giving manufacturers a defined window to prepare.

 

Many products fall under more than one of these frameworks. Getting the directive set right is not a paperwork exercise, it directly determines the scope of testing and documentation required, and it’s where projects most often go wrong from the start.

 

The CE Marking Process, Step by Step

The CE marking process is structured, not a single test. It runs from initial planning through ongoing post-market obligations, and each stage depends on the one before it. Here’s how it works in practice.

 

Step 1: Directive Identification and Test Planning

The first task is determining which EU directives apply to your product, based on its type, intended use, and operating characteristics. This isn’t always straightforward; a product sold into multiple application sectors may have different directive scope in each context.

 

Once the applicable directives are confirmed, the relevant harmonized standards are selected. Under EU product law, compliance with a harmonized standard confers a presumption of conformity with the corresponding essential requirements a product tested against the correct EN standard is legally presumed to meet the directive’s requirements. This presumption of conformity is a core mechanism of the CE marking framework, and selecting the right standards is therefore a substantive technical decision, not an administrative formality.

A test plan and documentation roadmap follow from this. They define what will be tested, against which standards, and what documentation will be required in the Technical File.

 

Step 2 : Pre-Compliance Assessment

For most products, jumping straight to formal accredited testing is the wrong move. Pre-compliance assessment conducted before production tooling is committed, surfaces design weaknesses early, when changes are still relatively inexpensive. A product that fails EMC testing at the pre-compliance stage costs a few days of engineering time to address. The same failure discovered during formal accredited testing can mean a test restart, a design iteration, and weeks of delay.

 

Stancer Testing-Lab offers pre-compliance EMC scans, safety checks, and RF preliminary assessments. These run on the same instruments and in many of the same environments as formal testing, but the outputs are informal reports with engineering commentary rather than accredited test certificates. The goal is diagnostic to give your engineering team specific, actionable feedback before the formal test phase begins.

 

Step 3: Formal Testing in Accredited Facilities

Formal testing is conducted in Stancer’s ISO/IEC 17025 accredited facilities against the applicable harmonized standards. The test scope depends on the directives identified in Step 1, but typically includes:

 

EMC testing: radiated and conducted emissions, electrostatic discharge (ESD), electrical fast transient/burst (EFT), surge, conducted RF immunity, radiated RF immunity, power frequency magnetic field, and voltage dips and short interruptions.

Safety testing: dielectric strength (hi-pot), insulation resistance, protective earth resistance, leakage current, creepage and clearance distance verification, flammability of enclosures, and temperature rise testing.

Radio/RF testing: frequency accuracy, transmit power, effective isotropic radiated power (EIRP), spurious and harmonic emissions, adjacent channel power ratio, occupied bandwidth, and receiver sensitivity where applicable.

 

All test reports issued by Stancer reference the specific standard versions and test methods used. These reports are formatted for direct inclusion in the Technical File.

 

Step 4: Technical File Compilation

The Technical File is the complete evidentiary package that supports the product’s conformity claim. Its structure is defined by the applicable directives, but it typically includes: general product description, design drawings and schematics, component lists, risk assessment, test reports, instruction manuals, and the EU DoC.

 

Non-EEA manufacturers must designate an EU authorized representative this is a legal obligation under most directives, not an optional arrangement.

 

Technical File compilation is where manufacturers most frequently run into problems. Missing documents, incorrect standard references, and poorly structured risk assessments are common findings in market surveillance investigations. Stancer’s engineers have structured Technical Files across multiple directive categories and know what regulators look for.

 

Step 5: Declaration of Conformity

The EU Declaration of Conformity is the legally binding document that finalizes the conformity marking process. It must contain: the manufacturer’s name and address, a description of the product (including model/type designation), a statement identifying all applicable directives, references to the harmonized standards applied, the year in which the CE mark was first affixed, the place and date of issue, and the name and signature of the authorized signatory, who, in signing, accepts sole responsibility for the declaration’s contents.

 

Where a Notified Body is required: for certain medical devices, ATEX equipment, or specific conformity assessment procedures that mandate third-party involvement, the NoBo’s identification number must appear on the CE marking and be reflected in the DoC. Stancer coordinates with relevant Notified Bodies where this applies.

 

Step 6: Ongoing Compliance and Post-Market Obligations

Obtaining the CE conformity marking is not a one-time event. Technical Files must be retained for 10 years from the date the last unit of that product model was placed on the market under most directives, an obligation that sits with the manufacturer.

 

Product modifications after CE marking require an assessment of whether compliance is affected. Changes to internal circuitry, software, enclosure design, power supply configuration, or intended use can all trigger a requirement to revisit, and in some cases repeat, the testing and documentation. There’s no universal rule; it’s a case-by-case engineering judgment.

 

Manufacturers also need a process for responding to market surveillance authority inquiries and for tracking updates to the harmonized standards referenced in their Technical File. When a harmonized standard is revised and the previous version withdrawn, products must be re-assessed against the new version before a defined transition date.

 

CE Marking Testing Services at Stancer

 

EMC Testing for CE Marking

Stancer’s EMC test facilities support the full range of conducted and radiated measurements required for CE marking under both the EMC Directive 2014/30/EU and the Radio Equipment Directive 2014/53/EU.

 

Emissions testing is conducted per EN 55032 (multimedia equipment), EN 55011 (industrial, scientific, and medical equipment), EN 55014-1 (household appliances), and EN 55015 (luminaires and lighting equipment), as applicable to the product class.

 

Immunity testing covers the full IEC 61000-4 series:

 

Test environments include a semi anechoic chamber for radiated measurements, and shielded rooms for conducted testing. Accredited test reports are issued on completion, structured for direct reference in the Technical File.

 

Electrical Safety Testing (LVD)

Safety testing under the Low Voltage Directive 2014/35/EU is performed against the applicable harmonized standard for the product type. Current relevant standards include EN 62368-1 (audio/video, information and communication technology equipment), EN 61010-1 (measurement, control, and laboratory equipment), and related sector-specific standards. EN 60950-1 is referenced for legacy products and existing Technical Files where the standard has not yet been superseded in that context.

 

Measurements include:

  • Dielectric strength (hi-pot testing)

  • Insulation resistance

  • Protective earth resistance

  • Leakage current (touch current and protective conductor current)

  • Creepage and clearance distance verification per relevant standard tables

  • Flammability classification of enclosure materials per UL 94 / IEC 60695-11-10 as appropriate

  • Temperature rise testing at rated load

  • Component stress analysis

 

Radio and Wireless Testing (RED)

Radio Equipment Directive testing at Stancer covers the three essential requirements of Article 3.1a (safety), 3.1b (EMC), and 3.2 (radio spectrum efficiency). RF-specific measurements include:

  • Frequency accuracy and frequency deviation

  • Transmit power and EIRP

  • Spurious and harmonic emissions

  • Adjacent channel power ratio (ACPR)

  • Occupied bandwidth (OBW)

  • Receiver sensitivity and selectivity, where applicable

 

Standards applied depend on the radio technology. Commonly referenced standards include:

  • EN 300 328— wideband transmission systems, 2.4 GHz (Bluetooth, Wi-Fi, Zigbee)

  • EN 301 893 — 5 GHz Wi-Fi

  • EN 300 220 — short-range devices (SRD)

  • EN 303 413— GNSS receivers

  • EN 302 208 — RFID equipment

  • EN 301 511 / EN 301 908 series — cellular radio equipment

 

Pre-Compliance Testing

Pre-compliance testing is available for EMC, RF, and safety at early prototype and late design-verification stages. Outputs are informal technical reports rather than accredited test certificates, but the measurements run on calibrated equipment and the engineering commentary is specific enough to drive design decisions.

 

Catching an emissions problem at pre-compliance typically takes a day of engineering effort to address. The same problem found at formal testing can add weeks and additional test fees. Pre-compliance doesn’t guarantee a pass on formal testing, but it substantially improves the probability.

 

Technical File and Documentation Support

Stancer’s engineers can assist with the full Technical File, not just the test reports, but the surrounding documentation that regulators scrutinize. This includes:

  • Risk assessment per EN ISO 12100 (for machinery) or equivalent methodology for other product types

  • Review of instruction manuals for conformity language, safety markings, and required warnings

  • DoC drafting and review against directive-specific content requirements

  • Identification and resolution of documentation gaps before the file is completed

 

Products We Test for CE Marking

Stancer tests a wide range of product types. The categories below cover the majority of the compliance work we handle, though the list isn’t exhaustive.

 

Consumer Electronics and Smart Home Devices: wireless routers, streaming media devices, smart speakers, home automation controllers, and similar products. These typically require RED + EMC + LVD testing, and often pre-compliance work given the competitive timelines involved.

Industrial Machinery and Equipment: presses, conveyors, CNC equipment, robotic cells, and other machinery subject to the Machinery Directive 2006/42/EC (or Machinery Regulation 2023/1230, which applies from 20 January 2027). Machinery CE marking often involves both safety and EMC testing, plus a detailed risk assessment.

IoT and Connected Products :devices incorporating Bluetooth, Wi-Fi, Zigbee, LoRa, GNSS, or other radio technologies. Directive overlap (RED + EMC + LVD) is standard for this category, and the test scope is correspondingly broad. IoT products also increasingly fall within scope of the Cyber Resilience Act.

Power Tools and Electrical Equipment: hand-held and stationary power tools, welding equipment, and similar hand-held electrical products. These require electrical safety testing under EN 62841 or related standards alongside EMC testing.

Medical and Healthcare Devices: non-implantable diagnostic and monitoring equipment subject to MDR 2017/745/EU. EMC testing for medical devices follows the IEC 60601-1-2 series, which has specific performance criteria and test levels that differ from industrial EMC standards.

Wireless and Radio Communications Equipment: DECT handsets, PMR radios, cellular modules, GNSS receivers, and similar dedicated radio equipment. RF testing scope under RED Article 3.2 is the primary requirement for these products.

Lighting Products: LED drivers, control gear, and luminaires. Compliance typically involves the LVD, the EMC Directive (emissions per EN 55015, immunity per the relevant EN 61547 series), and Ecodesign requirements.

Power Supplies and Converters: switch-mode power supplies (SMPS), uninterruptible power supplies (UPS), and power inverters. These require LVD safety testing, EMC testing for both emissions and immunity, and in some cases energy efficiency measurements under Ecodesign.

 

Global Product Compliance: Beyond CE Marking

CE marking opens the EU and EEA market. For most manufacturers, that’s one market of several. EU market access secured, the next challenge is coordinating the additional certifications, North American, UK, Asian, and Australian requirements each have their own frameworks, and the most efficient approach is to plan for all target markets from the start of the test program rather than handle each market separately and repeat testing that could have been shared.

 

UKCA Marking ,Great Britain

UKCA marking is required for products placed on the markets of England, Scotland, and Wales. The technical requirements closely mirror CE marking in most areas, and many of the same harmonized standards apply with UK-designated equivalents. UKCA and CE are, however, legally distinct systems: UK Approved Bodies are separate from EU Notified Bodies, and the underlying UK legislation references UK-retained law rather than EU directives.

 

Stancer can often structure a CE test program so that the resulting test evidence also supports UKCA documentation. The specific approach depends on the product type and the conformity assessment procedures involved.

 

Why Choose Stancer Testing-Lab for CE Marking?

 

ISO/IEC 17025 Accreditation, What It Means for Your Project

ISO/IEC 17025 is the international standard that defines competence requirements for testing and calibration laboratories. Accreditation means an independent body has assessed the laboratory’s technical capabilities, measurement systems, staff competence, and quality management processes against defined criteria not just reviewed a quality manual.

 

For CE marking purposes, this matters because accredited test data carries legal weight. Market surveillance authorities, Notified Bodies, and certification bodies worldwide accept test data from ISO/IEC 17025 accredited laboratories. Data from non-accredited sources may not be accepted, particularly for higher-risk product categories or if a regulatory challenge arises.

 

Stancer’s accreditation scope covers the specific measurements required for CE marking under LVD, EMC Directive, and RED. That’s a verifiable scope, not a general claim.

 

Efficient, Integrated Testing and Documentation

Many manufacturers use separate vendors for testing, documentation, and EU representation, a model that creates coordination overhead, introduces version control problems between test reports and Technical Files, and slows the overall process. Stancer provides single-source capability from test planning through DoC drafting.

 

The engineers working on your project understand the full scope, they’re not just running tests to a specification and handing over a report. They know what the Technical File needs to contain, how the test results relate to the directive’s essential requirements, and where documentation gaps typically arise. That reduces the administrative burden on the manufacturer and the risk of errors that surface only during a market surveillance inquiry.

 

Transparent Project Management

Each engagement has a dedicated project contact. Before testing begins, a clear test plan is issued defining scope, applicable standards, equipment operating conditions, and expected deliverables. Milestone reporting is provided throughout the testing phase. If a test result raises a question or a configuration needs adjustment, the project contact communicates directly, not through a generic customer service queue.

 

Timeline and Cost Guidance

Project timelines for CE marking vary with product complexity, the number of applicable directives, and most significantly whether a Notified Body is involved. As a general guide for standard products:

  • Pre-compliance review: 3–5 business days

  • Full EMC + safety test program: 2–4 weeks, depending on product complexity and initial pass rate

  • Technical file compilation: 1–2 weeks, typically running concurrently with formal testing

  • Total from kickoff to CE mark affixation: 4–8 weeks for a standard product

 

Cost is driven by the number of applicable directives, the breadth of the test scope, whether Notified Body involvement is required, and the number of product variants. Stancer provides a detailed quote before project start so manufacturers can plan resources accurately.

 

Frequently Asked Questions

 

Can I self-declare CE marking without involving a third-party lab?

For many product categories, yes. Under most EU directives, the manufacturer can self-declare conformity based on internally generated testing — provided that testing is technically robust and properly documented. Using an ISO/IEC 17025 accredited laboratory ensures that test data is credible, defensible in a market surveillance context, and acceptable to Notified Bodies where they’re involved. For products in higher-risk categories (certain medical devices, ATEX equipment, specific machinery types), third-party involvement isn’t optional — it’s a legal requirement of the conformity assessment procedure.

 

What is the difference between a Notified Body and an ISO/IEC 17025 accredited lab?

A Notified Body is an organization designated by an EU member state to carry out mandatory third-party conformity assessment procedures for specific product categories. Notified Body involvement is only required where explicitly specified by the applicable directive. An ISO/IEC 17025 accredited laboratory is a testing laboratory whose technical competence has been independently assessed — it generates test data and issues test reports, but it doesn’t issue CE marking certificates or carry out Notified Body procedures. Many CE marking projects require an accredited laboratory but not a Notified Body.

 

How long does CE marking take?

For a standard electrical or electronic product, a full CE marking project — from initial directive identification through Technical File completion — typically takes 4–8 weeks. Products with broader scope (multiple directives, complex EMC performance, or pre-compliance work needed) take longer. Where Notified Body certification is required, add weeks to months depending on the NoBo’s queue and review cycle.

 

What documentation do I need to keep after CE marking?

Under most EU directives, the Technical File must be retained for 10 years from the date the last product was placed on the market. The EU Declaration of Conformity must be retained for the same period. Both must be made available to national market surveillance authorities on request. The retention obligation sits with the manufacturer — or, for non-EEA manufacturers, with their EU authorized representative.

 

Does CE marking cover all EU member states and the EEA?

Yes. CE marking provides market access across all 27 EU member states, plus Iceland, Liechtenstein, and Norway as EEA members. A single conformity assessment and Declaration of Conformity opens the entire EEA market, no separate national approvals required.

 

What happens if my product is modified after CE marking?

The manufacturer must assess whether the modification is substantial enough to affect conformity with the applicable directives. Changes that could affect EMC performance, electrical safety, radio parameters, or the product’s fundamental characteristics typically require a re-assessment and, in many cases, partial or full re-testing. There’s no automatic re-testing trigger based solely on the type of change, it requires documented engineering judgment. When in doubt, the safer position is to re-test the affected areas and update the Technical File accordingly.

 

Do I need separate UKCA marking in addition to CE marking?

If your product is placed on the Great Britain market (England, Scotland, and Wales) as well as the EU/EEA market, you generally need both CE and UKCA markings. Northern Ireland remains under CE marking requirements. UKCA technical requirements are largely aligned with the EU framework in most product areas, and existing test evidence can often support both sets of documentation but the two declarations and markings must be maintained separately.

 

What is the General Product Safety Regulation (GPSR) and how does it affect CE marking?

The General Product Safety Regulation (EU) 2023/988 became fully applicable on December 13, 2024, replacing the General Product Safety Directive. It applies to consumer products not already covered by specific EU product legislation (such as LVD, RED, or MDR). Where a product is fully covered by sector-specific CE marking directives, GPSR’s direct impact on the CE marking process is limited, the sector-specific rules prevail. GPSR does, however, introduce new obligations for online marketplaces and reinforces general safety obligations for manufacturers, importers, and distributors, particularly around product recalls and market surveillance cooperation.

 

Start Your CE Marking Project

Contact Stancer to discuss your product’s CE marking requirements. We offer a free preliminary consultation to review applicable directives, outline the test scope, and provide a project quote. For manufacturers targeting multiple markets, we can develop a coordinated compliance plan from the outset.

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