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.
Explosion-proof product categories certified:
The new implementation details are divided into 17 product units:
Explosion-proof motors: Center height ≤ 160mm or rated power ≤ 15kW, Explosion-proof motors: 160mm < center height ≤ 280mm or 15kW < rated power ≤ 100kW, Explosion-proof motors: 280mm < center height ≤ 500mm or 100kW < rated power ≤ 500kW, Explosion-proof motors: Center height > 500mm or rated power > 500kW.
2. Explosion-proof electric pumps
3. Explosion-proof distribution equipment
4. Explosion-proof switches, control and protection products
5. Explosion-proof starters
6. Explosion-proof Transformers
7. Explosion-proof electric actuators, solenoid valves
8. Explosion-proof plug-in device
9. Explosion-proof surveillance products
10. Explosion-proof Communication and Signal Equipment
11. Explosion-proof Air Conditioners, Ventilation Equipment
12. Explosion-proof electric heating products
13. Explosion-proof accessories, Ex components
14. Explosion-proof instruments and meters
15. Explosion-proof sensor
16. Safety Fencing
17. Explosion-proof instrument cabinets

Do you need to do an explosion-proof design before applying for the explosion-proof certification of the product?
This is for sure.
The process of obtaining a防爆 certification for products is to pass the relevant test items of the explosion-proof standards and acquire an explosion-proof qualification certificate.
To ensure the product passes the explosion-proof standard test items, it is necessary to design the product according to the test requirements, which is to say, to implement explosion-proof design.
For explosion-proof requirements, refer to GB/T3836.1 and GB/T3836.2; for intrinsic safety design, consult GB/T3836.1 and GB/T3836.4; for positive pressure design, refer to GB/T3836.1 and GB/T3836.5.
If your equipment is about to apply for explosion-proof certification and enter the explosion-proof market, please send us a private message right away! ZhongNuo Inspection has been deeply involved in the explosion-proof field for many years, familiar with the technical requirements of GB/T3836 and EN/IEC60079 explosion-proof standards, and offers explosion-proof product rectification and design guidance, as well as a one-stop explosion-proof technical solution.

What are the requirements for a company to apply for explosion-proof certification -- Shenzhen ZhongNuo Testing Technology Co., Ltd.
For enterprises, there are no special requirements for obtaining the domestic explosion-proof certificate (except for the explosion-proof 3C certification).
Primarily, to assess if the products meet explosion-proof standards and whether the necessary certification documents can be provided.
If the product falls under the Explosion-Proof 3C Certification Catalog, the applicant must have a production factory (OEM/ODM is also acceptable).
Because the explosion-proof 3C certification is a certification model that involves both type testing and factory inspection.
In addition to product testing, an annual review of the manufacturing facility is required.

What are the requirements for applying for an explosion-proof certificate for a gas detector?
Gas detectors are a common type of explosion-proof product, including intrinsically safe, flameproof, and both flameproof and intrinsically safe types.
The type of explosion-proof design to be adopted depends on the product's structure, installation method, and usage location, among other factors.
Portable, handheld models are recommended to obtain intrinsic safety explosion-proof certification; they are quite convenient.
Additionally, if used in Zone 0, the gas detector can only be intrinsically safe IA explosion-proof grade.
Designing intrinsically safe products requires considerations for intrinsic circuit design, shell material, battery temperature rise tests, etc.
Fixed installations can be made explosion-proof. Explosion-proof products tend to be bulky, primarily achieving explosion protection through the use of an explosion-proof housing.
Even if internal components generate sparks, the explosion can be stopped from spreading due to the explosion-proof casing's function.
On the other hand, the housing can also prevent external explosion sparks from entering the interior of the equipment.
Of course, some gas detectors simply cannot achieve explosion-proof capabilities with inherent safety or intrinsic safety alone.
At this point, consider the composite explosion-proof types, such as explosion-proof and intrinsically safe.
ZhongNuo Inspection has already obtained domestic and international explosion-proof certificates for gas detectors, alarms, transmitters, and other measuring instruments for our clients.
We have extensive experience and case studies. Feel free to message us for a discussion!
Explosion-proof Certification Application Consultancy Services - Shenzhen ZhongNuo Testing Technology Co., Ltd.