Frequently Asked Questions

Ex = Explosion protection mark, indicating compliance with international explosion protection standards.
d = Flameproof enclosure (Ex d) protection method - explosions are contained within a robust enclosure.
II = Group II, non-mining equipment (Group I is for coal mining).
C = Gas group for most hazardous gases (IIA less hazardous < IIB < IIC most hazardous; acetylene and hydrogen are IIC).
T6 = Maximum surface temperature not exceeding 85C. T6 is one of the higher temperature classes, suitable for acetylene, hydrogen and other highly flammable gases. Temperature classes from T1 to T6 - higher is safer.

ATEX: EU Explosion Protection Directive (2014/34/EU) - CE+ATEX is mandatory for EU market, without which customs clearance is impossible.
IECEx: International Explosion Protection Certification System - highest acceptance in Middle East (Saudi Arabia, UAE, Kuwait) and Southeast Asia (Singapore, Malaysia). Some projects require both ATEX and IECEx.
CCC: China Compulsory Certification for domestic market.
UL/FM: North American certification - UL listing or FM certification required for USA export. ATEX and IECEx are not mutually recognized with UL/FM.

Dual certification means holding both Ex d (flameproof for explosive gas environments) and Ex t (dust protection for combustible dust environments) certifications, marked as Ex db IIC T6 Gb / Ex tb IIICT80C Db. Required for locations with both gas and dust explosion hazards, such as: certain chemical processing areas, grain storage and processing facilities, powder metallurgy workshops.

Explosion proof cameras use flameproof enclosures (Ex d) or intrinsic safety (Ex e/Ex i) designs that can withstand internal explosions without igniting external atmospheres. They are required for Zone 0/1 hazardous areas in refineries, chemical plants, and mines. Regular industrial cameras have no explosion protection - using them in hazardous areas creates an immediate explosion hazard. Price difference is typically 3-10x.

30m: Indoor factory floors, equipment spacing under 50m.
50m: Medium chemical plant access roads, perimeter fencing.
100m: Large oilfield wellheads, port terminals, large tank farm areas.
100m+: Thermal+IR dual-spectrum cameras recommended - thermal imaging works without ambient light and can also measure temperature.

Bullet/Dome cameras: Fixed area monitoring (tank farms, equipment, valves) - simple installation, lower cost, no operator required.
PTZ cameras: Wide-area patrol (ports, wellheads, facility perimeter) - 360 degree continuous rotation, optical zoom, target tracking capability. PTZ price is typically 3-5x that of bullet cameras. Choose PTZ when you need to cover large areas and track moving targets; choose bullet/dome for fixed monitoring.

IP68: IEC 60529 ingress protection standard. 6 = completely dust-tight (no dust ingress); 8 = submersible (1.5m depth for 60 minutes).
IK10: IEC 62262 impact protection. IK10 withstands 20 joules of impact energy (equivalent to 5kg weight dropped from 40cm), providing protection against vandalism and mechanical damage.

Standard explosion proof cameras operate at -10C to +60C. High-temperature water/air cooled models operate from -20C to +200C. Water-cooled models use circulating cooling water jackets for extremely high temperatures; air-cooled models use forced air circulation for up to 150C. Used in steel plant converters, kilns, coal-fired power plant coal handling systems. Using incorrect temperature range can cause overheating damage or failure of explosion protection.

Plus/minus 2C or plus/minus 2% of reading (whichever is larger) is the standard accuracy for industrial-grade thermal cameras. This means at a target temperature of 100C, the measurement will be between 98C-102C. Sufficient for most industrial temperature monitoring such as reactors, pipelines and furnaces. Not suitable for human body temperature measurement (requires plus/minus 0.5C). For high-precision needs (electronics inspection), choose plus/minus 1C or better models.

Offshore platforms face severe salt spray corrosion - SS316L stainless steel is required (SS304 will rust within 3-5 years in marine environments). Dual certification (Ex d IIC T6 Gb + Ex tb IIICT80C Db) is needed. IP68 mandatory, IK10 impact resistance important for wave and wind vibration. Choose PTZ cameras with high preset accuracy and vibration resistance, horizontal rotation speed at least 100 degree/s.

Chemical plant selection by zone: Zone 0/1 requires Ex d IIC T6 Gb certified products; Zone 2 can use Ex nA non-sparking type (lower cost). Recommendations by area: tank farms use bullet cameras + thermal imaging (monitor temperature and leaks); reactor areas use corrosion-resistant 316SS + high-temperature rated models; main corridors and large areas use PTZ. PoE plus fiber hybrid networking reduces field wiring and lightning surge risk.

Coal mines have both methane gas and coal dust - certification includes 'Mining' designation, requiring KBA (Mining Flameproof) or KDA (Mining Intrinsically Safe) series certifications plus MA (Coal Safety) marking. General chemical and industrial applications only require Ex d IIC T6 Gb. Always confirm whether the environment is 'underground coal mine' or 'general industrial' before ordering - wrong certification is ineffective and will result in regulatory penalties.

Yes, but mounting brackets must be explosion-proof certified metal brackets and installation must not compromise flameproof enclosure integrity. Ceiling pendant mount requires explosion-proof ceiling rose; wall mount requires sufficient bracket strength for equipment weight plus vibration; outdoor pole mount requires lightning protection with SPD (surge protection device). Any penetration of the flameproof enclosure requires professional installation.

1. Regularly clean window glass to maintain image quality; 2. Check waterproof seals especially on outdoor equipment; 3. Check cable connectors for corrosion; 4. Every 6 months check flameproof joints for rust or deformation; 5. Avoid using harsh chemicals to clean stainless steel. Power must be disconnected before maintenance. Non-professionals must not disassemble the flameproof enclosure - any damage to flameproof surfaces can cause explosion protection failure.

If camera has no power, first check power supply and wiring. If image is abnormal (black screen/corrupted) but device still runs, it may be a sensor or lens issue. Any suspected enclosure problem (collision damage, rust, deformation, seal failure) must result in IMMEDIATE shutdown and contact with manufacturer. Never open the flameproof enclosure yourself - repairs must be done by trained professionals in a proper workshop environment.

All BRAILLY products support ONVIF Profile S/T/G and GB28181-2016 protocols, compatible with Hikvision, Dahua, Uniview and other major NVR brands. Supports RTSP real-time streaming and HTTP configuration, some models support NAS network storage. Hik-Connect cloud platform direct integration. Confirm NVR brand and version compatibility before purchase.

Yes, full product range supports Hik-Connect platform integration with mobile app live preview, playback, alarm push notifications and cloud storage. Some models support EHome protocol for third-party CMS management platform integration. Large projects can be provided with privately deployed solutions - all data stored on user local servers, no cloud upload required.

Three solutions: 1. 4G wireless models (recommended) with built-in LET-TDD/LTE-FDD/WCDMA module, insert SIM card for wireless surveillance; 2. Standalone local storage with Micro SD card up to 256GB, no network required; 3. Solar + 4G integrated system for oilfields and mines without power or network - turnkey delivery. Confirm local 4G frequency band coverage before ordering.

We support private label/OEM/ODM customization including logo printing, packaging customization, color customization, lens parameter adjustment and more. Standard product MOQ is 1 unit. Custom products MOQ varies, typically 10-50 units. Export products can be provided with neutral packaging - no BRAILLY branding. Custom product lead time is 7-15 working days longer than standard items.

We provide: commercial invoice (proforma invoice), packing list, Bill of Lading, CE certificate (ATEX), IECEx certificate, Certificate of Origin (CO/Form E/Form A), test reports, product specifications. Export pricing on FOB or CIF basis. We can assist with Form A and other preferential certificates of origin. Some countries we can assist with import permits. We can accommodate DDP/DAP terms with customer designated forwarder.

Standard products are in stock - ships within 3-7 working days after payment. Custom products (custom lens, color, cable length) ship in 10-15 working days. Large orders can be delivered in batches per contract terms. Sample testing is supported - sample price equals bulk price, shipping cost collect. Major engineering projects can receive free sample loan (loan agreement required).

IEC/EN 60079 standard classifies explosive gas atmospheres: Zone 0 - explosive atmosphere continuously present or for long periods during normal operation (requires Ex i intrinsically safe or special Ex d); Zone 1 - explosive atmosphere likely to occur during normal operation (requires Ex d flameproof or Ex e increased safety); Zone 2 - explosive atmosphere not likely to occur during normal operation and only for short periods (Ex nA non-sparking acceptable). Selecting wrong zone certification is non-compliant, creates legal liability and safety risks.

T6 means maximum surface temperature does not exceed 85C, one of the higher temperature classes in explosion protection. T6 > T5 > T4 > T3 > T2 > T1, higher is safer. Acetylene (C2H2), Hydrogen (H2), Carbon Disulfide (CS2) and other gases with very low minimum ignition energy require T5/T6 rated equipment. General chemical plants (mainly methane, propane, butane) typically only need T4 (130C). Temperature class must be determined based on actual gas types present.

Flameproof principle: when an explosion occurs inside the enclosure, the enclosure must withstand the explosion pressure without deformation, and allow flame and hot gases to cool below their self-ignition temperature as they escape through precise mating gaps. Design must withstand at least 1.5x reference explosion pressure (typically 8-12 MPa). Flameproof joint gaps must be precisely controlled (typically 0.15-0.5mm) and measured with professional tools. Any damage (rust, deformation, scratches) causes explosion protection failure - repairs must be done by professionals. Never disassemble the flameproof enclosure yourself.