Shenzhen Zhongnuo Inspection & Technology Co., Ltd. is based in South China and specializes in explosion-proof certification and coal safety certification application consulting services, offering one-stop explosion-proof technology consulting.
Sample requirements for explosion-proof certification application:
The sample machine submitted by the company for inspection should match the approved drawings and be fully assembled. The number of units inspected should meet the requirements.
If special disassembly tools are required, they should be sent along as well.
For encapsulated electrical equipment, a set of both encapsulated and non-encapsulated products should be submitted.
The observation window's transparent parts should be supplied with an additional 5, at least 3.
The transparent parts of the lighting fixtures should be sent separately in at least 5 pieces, with an additional 8.
Rubber aging tests should provide 3 to 5 pieces of 35156 rubber blocks.
Insulate resistance testing for plastic enclosures requires two plastic sheets with a diameter of 150.60mm. If the dimensions permit, the plastic enclosure can be tested directly.
1-2 finished products are generally required.

Classification of explosion-proof certification -- Shenzhen Zhongnuo Testing Technology Co., Ltd.
Electrical equipment for explosive gas environments:
Explosion-proof type d
(2) Intrinsically Safe Type e
(3) Intrinsically Safe i
(4) Positive Pressure Type P
(5) Immersion Type
(S6) Sand-filled type q
Sealed Pour Type
(8) N-type
Electrical Equipment for Combustible Dust Environments
Dust-Extinguishing Shell
(2) Positive Pressure Type
(3) Intrinsically Safe
Sealed Pour Type
3. Intrinsically Safe Type S
4. Composite:防爆型式 that combines two or more of the above-mentioned types.

What should you pay attention to when applying for an explosion-proof certification?
1. Is the product design in accordance with the GB/T3836 standards?
2. Can certification documents be provided?
(1) Technical Drawings: Includes circuit diagrams, assembly drawings, structural drawings, PCB layouts, numbering diagrams, BOM (Bill of Materials) etc.
(2) Product Corporate Standards & Instructions
(3) Product Name, Model, Applicant Company
(4) Samples: Complete unit samples, batteries, uncapped circuit boards, non-metallic material surface blocks, etc.
(5) Additional Materials: Casting Sealing Process Documents, Copy of Ex Component Explosion-Proof Certificate, Battery Testing Report, Shell Material Testing Report, Wireless Transmission Power Testing Report, etc.
Not all of the above information is required; it depends on the actual structure of the product and its explosion-proof type.
3. Do you have engineers with explosion-proof technology expertise?
4. Are there specific requirements for the frequency of occurrence and explosion-proof grade?
5. Budget for costs
For more details, please feel free to contact Shenzhen ZhongNuo Testing Technology Co., Ltd. for further communication!

intrinsic safety certification, also known as intrinsic type explosion-proof certification. Below is a detailed introduction to intrinsic safety certification:
The fundamental definition of intrinsic safety:
intrinsic safety refers to a type of explosion-proofing that limits the circuit energy of electrical equipment, ensuring that in normal operation or during specified fault conditions, the resulting electrical sparks or heat effects cannot ignite surrounding flammable or explosive environments. This form of explosion-proofing primarily focuses on restricting energy within the circuit, reducing potential spark energy to below the level needed to ignite the specified gas mixture, and keeping the temperature of conductors and components below the ignition temperature of the gas mixture, thereby achieving intrinsic safety.
Application Scope of Intrinsically Safe Equipment:
The intrinsic safety certification is widely used for instruments and equipment with low power consumption and energy, such as handheld terminal products. Due to the relatively low energy generated by these devices, it is easy to control them within a manageable range through technical means, thus meeting intrinsic safety requirements. Products like temperature vibration sensors, remote transmitters, monitoring devices, Bluetooth beacons, and walkie-talkies can all undergo intrinsic safety certification.
Intrinsic Safety Certification Standards:
The domestic intrinsically safe certification standards primarily include GB/T3836.1 and GB/T3836.4, etc. The international IECEx certification standards are IEC60079-0 and IEC60079-11. These standards provide detailed regulations on technical requirements, testing methods, and inspection rules for intrinsically safe electrical equipment, ensuring the equipment's intrinsic safety performance.
Required documents for obtaining the ATEX certification:
Including product manuals, corporate standards, electrical schematics, block diagrams, PCB layouts, assembly drawings, battery specifications, potting process documents, wireless transmission power reports, and shell material reports.
The significance of intrinsic safety certification:
Certified for intrinsic safety, these devices significantly reduce the risk of accidents in flammable and explosive environments, safeguarding personnel and property from damage. Moreover, obtaining intrinsic safety certification is a crucial entry requirement for a company's products to enter relevant markets, enhancing their market competitiveness.
Explosion Proof Certification Application Consulting Services - Shenzhen Zhongnuo Testing Technology Co., Ltd.