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 a one-stop explosion-proof technology consulting service.
Shenzhen ZhongNuo Testing Technology Co., Ltd. offers design, testing, and certification guidance as well as agency services for obtaining safety approvals for explosion-proof products. We specialize in intrinsically safe circuit design and products, providing services such as intrinsically safe design, circuit evaluation, structural design, and drawing guidance. Our successful cases include various sensors, instruments, automation equipment, and robotic products. Feel free to message us anytime for detailed communication!

intrinsic safety certification, also known as intrinsic safety explosion-proof certification, involves limiting the circuit energy of electrical equipment to ensure that during normal operation or under specified fault conditions, the electrical sparks or heat effects produced by the equipment cannot ignite the surrounding flammable or explosive environment. Below is a detailed introduction to intrinsic safety certification by Shenzhen Zhongnuo Testing:
Section 1: Definition of ATEX Certification
Essentially, safety focuses on limiting the energy within the circuit, reducing potential spark energy to below the ignition level of the specified gas mixture. Simultaneously, the surface temperature of the wires and components is kept below the ignition temperature of the gas mixture, thereby achieving intrinsic safety.
Scope of Application for ATEX Certification
Intrinsically safe certification is widely used for instruments and hand-held terminal products with low power consumption and energy levels. These devices produce relatively low energy, making it easy to control them within a safe range through technical means, to meet intrinsic safety requirements. Products such as temperature vibration sensors, remote transmitters, monitoring devices, Bluetooth beacons, and walkie-talkies are all suitable candidates for intrinsic safety certification.
Section 3: Certification Standards for Intrinsic Safety‌
Domestic intrinsically safe certifications mainly follow standards such as GB/T 3836.1 and GB/T 3836.4, while the international IECEx certifications adhere to IEC 60079-0 and IEC 60079-11. These standards provide detailed regulations on technical requirements, testing methods, and inspection items for intrinsically safe electrical equipment, ensuring the inherent safety performance of the devices.
IV. Documents Required for the Safety Certification Application
To obtain the safety certification, a series of documents are required, including product manuals, corporate standards, electrical schematics, block diagrams, PCB layouts, assembly drawings, battery specifications (if applicable), potting process files (if applicable), wireless transmission power reports (if applicable), and material reports for the casing (if applicable).
Section 5: The Significance of ATEX Certification
Certified for intrinsic safety, these devices significantly reduce the risk of explosion in flammable and explosive environments, ensuring personnel and property safety. Moreover, obtaining intrinsic safety certification is a crucial entry requirement for companies to enter the explosion-proof product market, which aids in enhancing their product's market competitiveness.
‌Six, Intrinsic Safety Certification Bodies‌
Shenzhen Zhongnuo Testing Technology Co., Ltd. is an established certification body with extensive experience and a skilled technical team. We are well-versed in standards and requirements, offering services ranging from safe design and modification of product circuits, technical documentation updates, to certification applications and factory inspections for businesses.
If you have any questions or needs regarding ATEX certification, please feel free to consult Shenzhen ZhongNuo Testing Technology Co., Ltd.

To obtain the safety certification, a series of documents are required, including product manuals, corporate standards, electrical schematics, block diagrams, PCB layouts, assembly drawings, battery specifications (if applicable), potting process files (if applicable), wireless transmission power reports (if applicable), and material reports for the housing (if applicable).

How to obtain explosion-proof certification for explosion-proof products?
Currently, explosion-proof products are categorized into mine-use and non-mine-use types.
Mining explosion-proof products for coal mine sites require the Coal Safety Certification.
We need to conduct both explosion-proof performance tests and standard performance tests for the products.
Adopt a certification method that includes product testing, factory audit, and supervisory assessment, which we commonly refer to as factory audits and annual reviews.
Applicants must have a manufacturing facility or a subcontracting factory.
Non-mining explosion-proof products require explosion-proof certifications, which are divided into two types: explosion-proof certificate certification and explosion-proof 3C certification.
Products listed in the explosion-proof 3C certification catalog must obtain an explosion-proof 3C certification certificate.
This requires product testing + factory audit + supervision and evaluation; products not listed in the explosion-proof 3C certification directory only need product testing.
The product can be issued with an explosion-proof certification upon passing inspections that meet the GB/T 3836 standards.
Explosive-proof products for export require different safety certifications based on the specific requirements of the export destination.
For example, ATEX certification, IECEx certification, etc. For more details, please consult China Nu Inspection for further information.
We offer domestic and international explosion-proof consulting services, well-versed in standards and requirements.
Some explosion-proof engineers and factory audit teachers can assist companies in conveniently obtaining explosion-proof certifications.
Explosion-proof Certification Application Consulting Services - Shenzhen Zhongnuo Testing Technology Co., Ltd.