Precision HMI Catalog
Featured CE Certified Graphic Overlays & Switch Assemblies
Explore our OEM/ODM custom membrane switches, surface overlays, and tactile dome arrays specifically structured with high-adhesion 3M acrylic adhesive transfer tapes for tropicalized durability in El Salvador.
Price 1 Row 4 Key Custom Made One Button Quality Golden Supplier Keyboard Membrane Switch
Manufacturer Custom Membrane Keypads Membrane Keyboard and Led Membrane Graphic Overlay
Customized Medical Instrument Membrane Switch PET Membrane Key PC Membrane Switch
Custom Diy 4x4 Tactile Dome Flexible Membrane Switch Graphic Overlay Membrane Keypad
New Trend Factory Custom Cross 4-Legged Snap Dome Poly Metal Dome in Reel Packing Metal Dome Array
Polycarbonate Film Touch Switch Panel Screen Printing Process Electronic Product Instrument Display Membrane Switch
Custom Waterproof Keypad Smart DoorTouch Switch Button Membrane Switch PMMA Membrane Switch Panel Capacitive
Engineering Authority & Material Science
Multi-Layer Sub-Surface Architecture for Harsh Environments
A front panel overlay is never just a printed decorative sticker; it is the mission-critical protective barrier between harsh industrial working atmospheres and sensitive printed circuit board assemblies (PCBA).
Sub-Surface Screen Inks
Graphics are silk-screened or digitally printed on the underside of the transparent substrate (second-surface printing). Wear, mechanical abrasions, aggressive degreasers, sanitizing alcohols, and direct UV sunlight cannot erode legends or color values.
Autotype PET vs. Lexan™ PC
We specify biaxially oriented Autotex / Autoflex PET for dynamic flex keys requiring up to 5,000,000 actuations without micro-cracking, and high-optical Lexan™ 8010 Polycarbonate for high-impact industrial control consoles and instrument display windows.
Hermetic 3M VHB Bonding
Utilizing genuine 3M 467MP, 468MP, or 3M 300LSE adhesive films prevents delamination caused by humidity, plasticizer migration, or oily powder-coated metal and low-surface-energy polypropylene (LSE) enclosures.
Central American Industrial Dynamics
Targeted Application Scenarios Across El Salvador
As El Salvador accelerates its logistical and industrial modernization—anchored by free trade zones in San Salvador, La Libertad, Santa Ana, and the logistics hub surrounding the Port of Acajutla—original equipment manufacturers, electronics refurbishers, and automation integrators encounter specific environmental and electrical hurdles. Dongguan Cevra Electronic Technology Co., Ltd. provides customized front panel solutions engineered for these specific localized operational conditions:
1. Agro-Industrial & Coffee Beneficio Control
Coffee processing (beneficios de café), sugar refining (ingenios azucareros), and grain sorting machinery require control panels that endure fine organic dust, high ambient humidity (often >85% RH), and acidic chemical vapors. Our IP66/IP67 rated sealed polyester overlays ensure zero particulate ingress into sensitive sub-circuits.
2. Textile Maquila & Apparel Automation
In El Salvador's textile export factories, industrial sewing lines, thermal press controllers, and fabric inspection equipment undergo continuous operator cycling across three shifts. We integrate nickel-plated SUS301 stainless steel domes with tactile feedback forces from 280g to 450g, offering operators tactile affirmation even while wearing protective industrial gloves.
3. Commercial HVAC, Food Tech & Cold Storage
From municipal refrigeration near Acajutla to commercial foodservice prep stations in San Salvador, condensing moisture and sudden thermal cycling (-20°C to +60°C) cause inferior adhesives to bubble. Cevra utilizes specialized anti-fog display windows and perimeter environmental gaskets that eliminate internal condensation.
Macro Economic Horizon
Market Evolution & Procurement Trends in El Salvador
Strategic purchasing decisions within Central America's northern triangle are shifting rapidly from disposable components to long-term reliability and standard-compliant assemblies.
Strict Alignment with CE & UL Standards
As Salvadoran manufacturing enterprises export finished commercial goods into the European Union and the United States via CAFTA-DR, sub-tier components must carry documented CE Certification, RoHS compliance, and flame-retardant UL 94 V-0 / VTM-2 ratings to mitigate non-tariff border rejections.
Migration from Mechanical to Capacitive HMI
Equipment makers are transitioning from cumbersome mechanical pushbuttons to flush capacitive touch sensor film switches with acrylic (PMMA) or scratch-resistant polycarbonate facings. This eliminates mechanical breakdown points and simplifies washdown procedures in sanitary pharmaceutical and food handling plants.
Rapid Digital Tooling & Agility
Local Salvadoran engineering teams frequently require prototype iterations (10 to 50 units) before initiating volume production. Our laser-cutting and CCD digital flatbed cutting tables eliminate steel-rule die tooling lead times, shipping production-grade physical prototypes to El Salvador within 5–7 working days via DHL/FedEx Express.
Why Cevra Stands Out
Integrated Factory Strength: Direct From Dongguan
Founded in March 2009, Dongguan Cevra Electronic Technology Co., Ltd. operates a true vertically integrated 2,600㎡ manufacturing facility in Guangdong, eliminating middleman markups and guaranteeing verifiable engineering traceability.
SGS Onsite Audited
Independent factory verification carried out directly by SGS Group. All cleanrooms, automatic laminating equipment, and workforce capacities are third-party authenticated.
Full In-House Lines
Automatic precision silk-screen printing, laser cutting, CCD vision drilling, high-accuracy dome pick-and-place, and automated laminating machines are housed strictly under one facility roof.
Comprehensive QC Lab
Pre-shipment verification on high/low temperature chambers, dome load trip force testers, holding tack testers, peel tension meters, and Mitutoyo optical measurement instruments.
Export-Ready Logistics
Fluent English engineering support, formal DFM feedback within 24 hours, Trade Assurance coverage, and specialized anti-static export vacuum packaging for international sea or air transport.
Procurement Guidance
Frequently Asked Questions by Industrial Buyers in El Salvador
Clear answers covering customs logistics, engineering file formats, environmental sealing ratings, and sample validation protocols.
Q. What engineering files are required to initiate a front panel overlay quote?
Our engineering office accepts vector drawings in Adobe Illustrator (.AI), AutoCAD (.DXF / .DWG), CorelDraw (.CDR), or high-resolution PDF. Please include distinct layers defining external die-cut outlines, window clear zones, embossing rims, circuit routing (if a membrane switch is integrated), and exact Pantone (PMS) or RAL color codes.
Q. How do Cevra's front panels withstand El Salvador's high humidity and heat?
We specify high-grade biaxially heat-stabilized polyester film (PET) and combine it with genuine 3M acrylic adhesive transfer systems (such as 3M 467MP for smooth surfaces or 3M 300LSE for textured metals/plastics). This layer stack prevents delamination, edge lifting, and adhesive creeping under continuous 90% RH tropical storage.
Q. Can your graphic overlays achieve true IP65 or IP67 waterproof certification?
Yes. By designing a continuous perimeter adhesive seal around the entire active switch or display area, we isolate the internal electronics and contact domes from liquids, washdowns, grease, and airborne debris, easily reaching IP65 to IP67 sealing when bonded to a clean, flat bezel.
Q. What are the standard shipping timelines and customs arrangements for El Salvador?
Prototypes are typically completed and dispatched within 5 to 7 working days. For delivery into San Salvador, Santa Ana, or Acajutla, we offer DDP, DAP, or FOB terms via international express couriers (DHL, FedEx, UPS) with air transit times averaging 4 to 6 business days. Full export documentation (Commercial Invoice, Packing List, CE Certificates, and Certificate of Origin) is provided with each shipment.
Q. What is the Minimum Order Quantity (MOQ) for custom-printed overlays?
We support prototype and pilot assembly batches starting as low as 10 to 50 pieces utilizing our digital cutting systems to avoid tooling fees. For high-volume series production, pricing becomes exceptionally competitive at 500, 1,000, and 10,000+ unit quantities.
Q. How are transparent LCD/LED windows treated to prevent scratching?
Depending on your optical requirement, we offer water-clear transparent windows, smoked tint windows, or textured-selective clear windows with anti-glare (AG) or anti-reflective (AR) surface treatments. Polycarbonate overlays can be enhanced with an electric pencil hardness hardcoat rating of up to 2H-3H.
Traceable Production Standard
Our ISO 9001:2015 7-Stage Manufacturing Process
Every front panel overlay and membrane switch manufactured for export undergoes strict in-process verification to maintain zero-defect standards.
01
DFM Engineering Review
Computer-aided layer stack analysis, pinout validation, circuit resistance check, and Pantone color match proofs.
02
Sub-Surface Screen Printing
Dust-free cleanroom printing of durable graphic colors and micro-conductive silver traces on premium polyester films.
03
Tactile Key Embossing
Precision hydraulic thermal plate embossing for rim embossed, pillow embossed, or hydro-formed key tactile boundaries.
04
Automatic Layer Laminating
Continuous roll-to-roll and sheet laminating integrating spacer films, 3M bonding adhesives, and internal venting channels.
05
Laser & CCD Die-Cutting
Sub-millimeter edge registration cutting, LCD window cutouts, and tail trimming via high-precision CNC laser plotters.
06
100% Optical & Loop Testing
Automated computer-vision cosmetic scan, switch loop resistance verification, and high-voltage dielectric insulation test.