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.
Difference between Intrinsic Safety and Explosion Proof:
These are two different types of explosion-proof protection.
Explosion-proof is typically achieved through the use of explosion-proof casings, which must have adequate thickness and strength.
Even in the event of an explosion within the equipment, the flame will be extinguished due to the width, gap, and roughness of the explosion-proof shell joint, preventing ignition of the external hazardous environment.
On the other hand, even if an explosion occurs in a hazardous area outside, the explosion-proof housing retains its anti-explosion properties.
Overall, the housing is both explosion-resistant and explosion-proof. The equipment will be relatively bulky.
intrinsic safety, referring to equipment that achieves inherent safety by limiting circuit energy, etc.
Safety-certified products have higher requirements for equipment's circuits and operating power, generally suitable for handheld devices and low-power products.

The Difference Between Applying for Explosion-Proof Certification and Intrinsically Safe Certification
Intrinsically Safe is a type of explosion-proof protection. Besides Intrinsically Safe, there are also explosion-proof, increased safety, sealed filling, and more.
The intrinsic safety certification merely indicates that this equipment employs an intrinsic safety explosion-proof design and has obtained explosion-proof certification.
Typically, intrinsically safe protective configurations primarily achieve explosion-proofing by limiting the energy of the equipment, thereby being inherently safe.
Suited for low-power products and handheld devices.

Domestic explosion-proof certification modes are divided into three categories -- Shenzhen Zhongnuo Testing Technology Co., Ltd.
1. Explosion-proof certification system
Applicable Products: Electrical and non-electrical equipment used in places with explosive gases and dust (excluding products listed in the Explosion-proof 3C Catalogue) that are not for mining purposes.
Certification Mode: Product Testing
Certification Certificate: Explosion-Proof Compliance Certificate
Certificate Validity: 5 years
Annual Audit Required: No
2. Intrinsically Safe 3C Certification System
Applicable Products: Electrical Equipment Listed in the Explosion-Proof 3C Catalog
Certification Mode: Combination of Type Testing and Factory Audit
Certification Certificate: CCC Certificate
Certificate Validity: 5 years
Is Annual Audit Required: Annual Audit Required
3. Coal Safety/Mine Safety Certification System
Applicable Products: Various electrical and non-electrical equipment for use in both coal and non-coal mines.
Certification Mode: Combination of Type Testing and Factory Audit
Certification Certificate: Mine Product Safety Mark Certificate
Certificate Validity: 5 years
Is Annual Audit Required: Annual Audit Required

What specific drawings are required for applying for the explosion-proof certification of the product?
1. General Assembly Drawing
2. Circuit Wiring Diagram
3. Circuit Diagram
4. Printed Circuit Board (PCB) Schematics
5. Component layout drawing
6. Component Materials List
7. Transformer and inductor coil diagrams (if applicable)
8. Packaging Diagram
9. Label Design
Explosion-proof Certification Application Consulting Service - Shenzhen Zhongnuo Testing Technology Co., Ltd.