Shenzhen Zhongnuo Testing Technology Co., Ltd. is based in South China and specializes in explosion-proof certification and coal mine safety certification application consulting services, offering one-stop explosion-proof technology consulting services.
How to Apply for an Explosion-Proof Certification for a Company:
1. Self-Application: The company applies to the certification body independently, prepares relevant documents on its own, assists in debugging the prototype independently, and modifies any irregularities in the documents independently. This process is relatively longer and involves higher comprehensive costs, as well as time and effort.
2. Agent Application: It refers to the entire process of consulting and applying to Shenzhen ZhongNuo Testing Technology Co., Ltd., including material revisions, prototype debugging, and progress coordination, which are handled by the consulting agency. It offers good progress assurance. The certification process is quick, the overall cost is manageable, and it saves time and effort.

What does the explosion-proof marking Exdb eb llB T6 Gb mean?
A complete explosion-proof marking includes:
Ex Mark
Explosion-proof type
Gas/Dust Combination
Temperature Groups
Equipment Protection Level
Ex db ib IIc T4 Gb
Ex tb ⅢC T130°C Db
Ex db eb llB T6 Gb
Ex indicates explosion-proof
db eb indicates the equipment is of an explosion-proof type with隔爆and increased safety design
llB indicates the equipment is suitable for explosive gas environments of llB and llA.
T6 indicates the equipment with surface temperature not exceeding 85°C.
Gb is the protection level of the equipment, suitable for Zones 1 and 2

The cost of obtaining explosion-proof certification at Shenzhen Zhongnuo Testing Technology Co., Ltd. is related to the following aspects:
1. Do you need an explosion-proof certificate or an explosion-proof 3C certification? For the 3C certification, a factory audit is required, which includes the audit fee, travel expenses for the auditor, the application fee for the 3C certificate, and the certificate fee, etc.
2. Related to explosion-proof markings. Different explosion-proof markings have different explosion-proof items, and the cost varies accordingly.
3. Domestic explosion-proof certification or international explosion-proof certification? The same explosion-proof mark, ATEX/IECEx certification is much more expensive than the domestic explosion-proof certificate, and it also requires a factory audit. North American explosion-proof certification is even more costly, over $100,000+
4. Do you need a retest? Some customers' products haven't been designed for explosion-proof at all, and they need to be rectified upon arrival, which adds to the cost. If the product includes a battery, the battery test is also an additional expense, especially for those batteries that keep failing the tests.
5. Needed or not. Labs are often booked up, and there's often a waiting list. If needed, there will be a fee involved.

Is the explosion-proof grade Ex db eb higher than Ex db?
The composite explosion-proof marking indicates that a single explosion-proof type is not sufficient for this product; it requires the use of two or more explosion-proof types.
For example, explosion-proof equipment with antennas, the antenna section is usually intrinsically safe, making this device both explosion-proof and intrinsically safe.
Additionally, the nozzle section of the oiler typically belongs to Zone 0, and can only be made as intrinsic safety IA. Other parts can be made into Zone 1, which can be intrinsic safety Ib or explosion-proof.
Composite explosion-proof products do not mean that the product must meet all the requirements of different explosion-proof types simultaneously, nor does it necessarily mean that the explosion-proof level of a composite explosion-proof type is always higher than that of a single explosion-proof type.
The primary factor in determining the explosion-proof level of a product is the gas/dust combination, temperature class, and equipment protection level.
Gas Mixture: ⅡC > ⅡB > ⅡA
Dust Combination: III-C > III-B > III-A
Temperature Grades: T6 > T5 > T4 > T3 > T2 > T1
Equipment Protection Combination: Ga > Gb > Gc, Da > Db > Dc
For more details, please contact Shenzhen ZhongNuo Testing Technology Co., Ltd. directly!
Explosion-proof Certification Application Consulting Services - Shenzhen ZhongNuo Testing Technology Co., Ltd.