Equipment designed for potentially explosive atmospheres requires careful consideration of every electrical and mechanical subsystem, including the display.
ATEX requirements are not simply a certification that can be added to an LCD module. Instead, the display is one component within a larger piece of equipment whose design, intended environment, electrical characteristics, thermal behavior, enclosure, and potential ignition sources must be evaluated as part of the applicable ATEX conformity process.
Focus LCDs supplies standard and custom display modules for OEM integration into industrial and other demanding equipment. When a product is intended for use in a hazardous environment, our role is to support the display portion of the design. ATEX conformity and certification of the final equipment remain the responsibility of the equipment manufacturer and the appropriate conformity-assessment professionals.
What Is ATEX Certification?
ATEX is the commonly used name for the European Union framework governing equipment and protective systems intended for use in potentially explosive atmospheres.
For equipment manufacturers, the primary product legislation is Directive 2014/34/EU. It establishes requirements for equipment and protective systems intended for potentially explosive atmospheres, as well as certain safety devices and components associated with that equipment.
A separate directive, Directive 1999/92/EC, addresses minimum requirements for protecting workers who may be exposed to explosive atmospheres in the workplace.
Potentially explosive atmospheres can occur when flammable gases, vapors, mists, or combustible dusts are present under conditions where ignition could result in an explosion.
Industries such as chemical processing, oil and gas, manufacturing, and mining may therefore require equipment specifically designed for hazardous locations.
Although the phrase “ATEX certification” is commonly used, the exact conformity-assessment process depends on the equipment classification and intended use. Different equipment categories can require different assessment procedures.
Does an LCD Display Need to Be ATEX-Certified?
Not necessarily.
An LCD should not automatically be described as “ATEX-certified” simply because it is incorporated into equipment intended for a hazardous environment.
The more important engineering question is how the display module and its associated electronics affect the safety and conformity of the complete equipment.
Depending on the design, the display subsystem may include:
- The LCD module
- Backlight and backlight driver
- Display controller electronics
- Touchscreen
- FPC cables
- Connectors
- Power circuitry
- Custom PCB or PCBA
- Cover glass
- Adhesives and bonding materials
- Mechanical mounting components
Each of these elements can interact with the larger electrical, thermal, and mechanical design.
Whether a particular display or component falls within the scope of ATEX requirements depends on its function, intended use, integration, and potential contribution to an ignition hazard.
For this reason, equipment manufacturers should evaluate the display as part of the overall hazardous-area design rather than assuming that purchasing an “ATEX LCD” resolves the certification requirement.
How Can ATEX Requirements Affect LCD Design?
The ATEX framework focuses heavily on preventing potential ignition sources. That means display integration can affect several aspects of the finished equipment.
Electrical Energy and Ignition Risk
LCD modules typically operate at relatively low electrical power, but low power alone does not make a display intrinsically safe or ATEX compliant.
The complete display subsystem may contain backlight drivers, controllers, connectors, touch electronics, power-conversion circuitry, and other components capable of influencing the electrical characteristics of the equipment.
The OEM must therefore consider how power enters the display system, how electrical energy is controlled, and how the display interfaces with the remainder of the product.
Intrinsic safety is one possible protection concept used in hazardous-area equipment, but it is not synonymous with ATEX and is not the only method available for designing equipment for explosive atmospheres.
Thermal Management
Temperature is another important consideration.
LCDs, LED backlights, display controllers, power circuitry, and other electronics can generate heat. The surrounding enclosure and ambient operating environment can also affect internal temperatures.
For equipment intended for potentially explosive atmospheres, engineers may need to consider whether the display subsystem contributes to surface temperatures or internal thermal conditions relevant to the overall equipment assessment.
This is different from simply specifying an LCD with a wide operating-temperature range.
A display may operate reliably at an elevated temperature without that fact alone establishing suitability for a hazardous environment.
Engineers working with demanding temperature requirements can learn more about LCDs with special temperature ranges.
Enclosure and Environmental Protection
The equipment enclosure often plays an important role in protecting the display and other electronics.
Depending on the product and protection concept, engineers may need to evaluate sealing, ingress protection, mechanical construction, cable entry, connectors, gaskets, and other enclosure characteristics.
However, environmental ruggedness and ATEX conformity should not be treated as interchangeable concepts.
An LCD assembly may have excellent resistance to dust, moisture, impact, or temperature without automatically being suitable for equipment intended for an explosive atmosphere.
Likewise, an IP or IK rating does not by itself establish ATEX conformity.
Mechanical and Electrostatic Considerations
Mechanical materials and construction may also require review as part of the complete equipment design.
Cover glass, touch surfaces, plastics, adhesives, enclosure materials, mounting methods, and other components can influence how the finished product behaves in its intended environment.
Electrostatic charging, mechanical impact, friction, and other potential ignition mechanisms may also be relevant depending on the equipment and protection method.
These considerations should be evaluated at the system level by the OEM and the appropriate hazardous-area or conformity-assessment specialists.
Touchscreen and User Interface Integration
Touchscreens introduce additional components into the display assembly.
A capacitive or resistive touchscreen may require additional electronics, cables, connectors, cover glass, adhesives, and mechanical integration.
For equipment being developed for hazardous environments, these elements should be considered early rather than added after the primary electrical and mechanical architecture has already been established.
Focus LCDs can integrate resistive or capacitive touchscreens, custom cover glass, FPC cables, optical bonding, adhesives, and other components into the display assembly when appropriate for the application.
ATEX Zones and Equipment Classification
Hazardous areas are classified according to the likelihood and duration of an explosive atmosphere being present.
For gases, vapors, and mists, commonly referenced areas include Zones 0, 1, and 2.
For combustible dust environments, the corresponding classifications include Zones 20, 21, and 22.
The equipment selected for a particular environment must be appropriate for the applicable hazard classification and intended use.
The classification of the hazardous area and selection of the required equipment protection approach should be established by qualified personnel responsible for the complete system and installation.
An LCD supplier should not determine the ATEX classification of the customer’s finished equipment.
What Makes Equipment ATEX Compliant?
There is no single feature that makes equipment ATEX compliant.
For equipment within the scope of the ATEX product directive, the manufacturer generally must address several areas as part of the conformity process, including:
- Defining the equipment’s intended use and operating environment.
- Determining the applicable equipment group, category, and protection requirements.
- Identifying potential ignition hazards.
- Designing the equipment to satisfy the applicable essential health and safety requirements.
- Applying appropriate standards and protection concepts.
- Completing the required conformity-assessment procedure.
- Maintaining the required technical documentation.
- Applying the required declarations and markings where applicable.
- Controlling design and component changes that could affect conformity.
The specific process varies according to the equipment being developed.
This is why simply selecting a CE-marked component—or even a component commonly used in hazardous environments—does not automatically make the complete product ATEX compliant.
Why LCD Lifecycle and Change Control Matter
Lifecycle management becomes particularly important when a display is incorporated into equipment that requires substantial qualification or certification.
Changing the display after the equipment has been validated can create additional engineering work because even apparently minor component changes can affect mechanical fit, electrical characteristics, firmware, optical performance, thermal behavior, or documentation.
OEM engineering teams should therefore consider:
- Long-term display availability
- Controlled revisions
- Component change notification
- Form, fit, and function
- Interface stability
- Backlight and controller changes
- Documentation
- Obsolescence planning
These principles are discussed further in our LCD lifecycle risk management for OEM programs.
For long-lifecycle equipment, selecting the display with production continuity in mind can be just as important as meeting the immediate prototype requirements.
How Focus LCDs Supports Equipment Designed for Hazardous Environments
Focus LCDs does not represent its LCD modules as ATEX-certified products and does not provide ATEX certification of a customer’s finished equipment.
Our role is the display.
We work with OEM engineering teams to evaluate display requirements such as:
- Display technology
- Mechanical dimensions
- Interface
- Power requirements
- Operating temperature
- Backlight configuration
- Optical requirements
- Touchscreen integration
- Cover glass
- FPC configuration
- Optical bonding
- Adhesives
- Custom PCB or PCBA integration
- Lifecycle requirements
For monochrome displays, Focus LCDs can provide glass-level customization, including dimensions, shape, resolution, segment configuration, and other assembly requirements.
For TFT displays, customization is performed around the TFT glass and can include FPC cables, backlights, touchscreens, cover glass, optical bonding, adhesives, PCB assemblies, and other value-added integration.
Additional capabilities are described on our custom display solutions page.
Plan the Display Early in the ATEX Design Process
For equipment intended for potentially explosive atmospheres, display selection should occur early in the system design process.
Waiting until the enclosure, power architecture, certification strategy, and mechanical design have already been established can limit display options or create unnecessary redesign work.
The OEM should establish the hazardous-area requirements and applicable ATEX strategy with qualified certification or conformity-assessment professionals. Focus LCDs can then work with the engineering team on the display requirements that support that overall design.
If your team is developing industrial or other equipment for a demanding environment and needs assistance selecting or customizing an LCD, contact our engineering support team to discuss the display requirements.
Focus LCDs provides standard and custom display solutions with U.S.-based engineering support from initial display selection through production.
Regulatory References
- European Parliament and Council, Directive 2014/34/EU, relating to equipment and protective systems intended for use in potentially explosive atmospheres.
- European Parliament and Council, Directive 1999/92/EC, addressing worker safety in potentially explosive atmospheres.
- European Commission, ATEX 2014/34/EU Guidelines, Sixth Edition, January 2026.
