Shenzhen Zhongnuo Testing 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 services.
An intrinsically safe design is a type of explosion-proof protection that limits electrical energy, ensuring that even in the event of a fault, the energy produced is insufficient to ignite the surrounding flammable or explosive environment.
Therefore, intrinsic safety requirements impose limitations on the current, voltage, capacitance, inductance, etc. of electrical equipment, making it suitable only for low-power devices.
Additionally, specific requirements are outlined for the power supply method of intrinsically safe equipment, plastic enclosures, and wireless transmission.
The product application for intrinsic safety certification requires the submission of the product's schematic, PCB diagram, and so on.
Shenzhen ZhongNuo Testing Technology Co., Ltd. boasts specialized engineers in intrinsically safe circuit and structural design. We offer technical consulting services for explosion-proof circuit design, drafting, and modifications. We have extensive experience in designing and obtaining certifications for intrinsically safe IA, IB, and IC explosion-proof ratings.
If you need certifications in this area, feel free to send us a private message!

Process for applying for an explosion-proof certification at Shenzhen Zhongnuo Testing Technology Co., Ltd.
1. Conduct product evaluation and initial quotation for the applied products. Evaluate the product using the company's product specification, electrical schematic, and component list, determine the appropriate type of explosion-proof certification for the product, and provide an initial quotation.
2. Provide samples for testing at the lab; the quantity of samples required varies depending on the product category.
3. Provide documentation list review
Application documents, including the applicant's information and product details
(2) Technical Documents - The submitted technical documents by the company include corporate standards or technical requirements, product drawings, user manuals, etc.
A. Company Standards/Technical Requirements: The company standards/technical requirements for products should be written in the prescribed format, including not only the performance requirements of the product but also relevant content regarding explosion-proof aspects: such as basic parameters, explosion-proof markings, operating environmental conditions, explosion-proof performance requirements, relevant tests for explosion-proof performance, and markings related to explosion-proof.
B. Product Drawings: When applying for a certification of explosion-proof compliance for intrinsically safe electrical equipment, the applicant should provide assembly drawings, circuit diagrams, printed circuit board layouts, silk-screening diagrams, material lists for components, and label drawings, etc. For non-intrinsically safe electrical equipment, the technical documents submitted for inspection should include drawings that reflect the explosion-proof performance of the sample (including assembly drawings and component drawings). If the assembly drawing clearly indicates the explosion-proof parameters and structure of the product, only the assembly drawing needs to be submitted for inspection.
C. Instruction Manual - The instruction manual should include basic parameters, explosion-proof markings, product outline drawings, installation, maintenance, order instructions, and clear warnings to the user regarding the importance of ensuring the product's explosion-proof performance during installation and use.
D. Other Documents: For products with adhesive bonding or casting, provide the型号 names, performance descriptions, and relevant process files for the adhesive and casting agents. For plastic enclosures, provide the material of the plastic and corresponding performance documents.
4. Issuance of Documents

What is the difference between ATEX certification and CE certification?
CE certification is a mandatory certification in the European Union market, and all equipment and products entering the EU market must pass the relevant CE directive certification.
For example, there are EMC directives, LVD directives, MD directives, and ATEX directives, etc.
Different products are subject to various certification directives; the ATEX directive, for instance, is specifically for explosion-proof equipment and products.
ATEX certification can be likened to the CE certification for explosion-proof products.
Each directive has different applicable standards; for the ATEX directive, it is the EN60079 series.
Different explosion-proof types are applicable to different standard series.
For example, EN 60079.1 is the standard for explosion-proof, EN 60079.7 is the standard for increased safety, and EN 60079.11 is the standard for intrinsic safety, etc.
Learn more about ATEX certification. Feel free to DM Shenzhen ZhongNuo Testing Technology Co., Ltd. at any time!

What test items are required to apply for an explosion-proof certificate?
Explosive-proof products require passing relevant test requirements of the explosive-proof standards to obtain an explosive-proof certificate.
Different explosion-proof types, catering to equipment used in various explosive environments, require different explosion-proof testing items.
Many customers also want to know what types of tests are required for explosion-proof products? What specific requirements are there for the explosion-proof design of the product?
Below, ChinaNuo Inspection will provide examples of common explosion-proof testing items.
For instance, with intrinsically safe products, general test items typically include appearance and structure inspection, spark ignition test, dielectric strength, battery and battery pack testing, temperature rise test, transient energy test, and more.
Flameproof products mainly undergo tests such as heat and cold resistance, internal ignition without propagation of explosion, shell pressure resistance, IP testing, temperature rise testing, etc.
Different testing items, tailored to various modules or components of the product, each test ensures that the product meets the explosion-proof standards and fulfills the requirements for explosion-proof performance.
If a company is designing explosion-proof products and is unaware of the explosion-proof standards requirements,
ZhongNuo Inspection can provide guidance services for explosion-proof circuit design and explosion-proof structural design, including explosion-proof standard requirements, design key points, and drawing guidance.
We also offer proxy services for explosion-proof testing and certification.
Need this service? Feel free to DM Shenzhen Zhongnuo Inspection Technology Co., Ltd. anytime!
Explosion-proof Certification Application Consulting Service - Shenzhen Zhongnuo Testing Technology Co., Ltd.