Shenzhen ZhongNuo Inspection & 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.
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, with common types including intrinsically safe, flameproof, and both flameproof and intrinsically safe.
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 certificates; they are relatively lightweight.
Additionally, for gas detectors used in Zone 0, they can only be intrinsically safe IA explosion-proof rating.
Designing for intrinsic safety requires consideration of intrinsic circuit design, material of the housing, battery temperature rise tests, etc.
Fixed installations can be made explosion-proof. Explosion-proof products tend to be heavier, primarily achieving explosion-proofing through the use of explosion-proof casings.
Even if internal components generate sparks, the explosion can be blocked from spreading due to the explosion-proof housing'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 can't simply achieve explosion-proof performance with inherent safety or explosion-proof design.
Consider explosion-proof and intrinsically safe composite explosion-proof types at this point.
ZhongNuo Inspection has obtained domestic and international explosion-proof certifications for gas detectors, alarms, transmitters, and other instruments and meters for our clients.
Extensive experience and case studies available. Welcome to DM us for a discussion!

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 Category
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 signifies that the equipment is explosion-proof in type with隔爆and increased safety.
llB indicates that the equipment is suitable for explosive gas environments of llB and llA.
T6 indicates the equipment with a high surface temperature not exceeding 85°C.
Gb is the protection level of the equipment, suitable for Zones 1 and 2

Classification of Explosion-proof Certification -- Shenzhen ZhongNuo Inspection & Testing Technology Co., Ltd.
Blastproof certification is the process of verifying that equipment meets the requirements of blastproof standards, type tests, and routine tests applicable to it, and issuing the relevant qualification certificates. Certificates can be issued for Ex equipment or Ex components.
Different regions have varying certification standards and systems for explosion-proof electrical products. Currently, international explosion-proof certifications include domestic explosion-proof certification, ATEX certification, IECEx certification, and North American explosion-proof certification.

Is ATEX certification the same as explosion-proof certification? What are the differences between them?
Blast-proof certification refers to a safety certification for equipment and products used in explosive hazardous areas.
Products must take certain measures to meet the requirements of explosion-proof certification standards, which we refer to as explosion-proof protection types.
Common explosion-proof protection types include intrinsic safety, flameproof, positive pressure, and increased safety, etc.
Clearly, intrinsic safety is just one type of explosion-proof protection.
Different explosion-proof protection types have varying design requirements for the product.
intrinsic safety is a type of explosion-proof protection that limits electrical energy, ensuring that even in the event of a fault, the generated energy is not sufficient to ignite the surrounding explosive environment.
Therefore, intrinsic safety requirements limit the current, voltage, capacitance, and inductance of electrical equipment, generally applicable to low-power devices.
Additionally, specific requirements are in place for the power supply method of intrinsically safe equipment, the material of the housing, and wireless transmission.
As a long-standing third-party consulting agency specializing in explosion-proof certification, CN Testing has dedicated in-house engineers for intrinsically safe circuit and structural design. We offer technical consultation on explosion-proof circuit design, drafting, and rectification. We have extensive experience in designing and obtaining certifications for intrinsically safe ia, ib, and ic classifications.
If you require certification in this area, feel free to message us privately!
Explosion-proof Certification Application Consultation Service - Shenzhen ZhongNuo Testing Technology Co., Ltd.