Quick Q&A: Which Companies in Zhejiang Offer Good Airtightness and Water Resistance Testing Equipment? This Article Explains It All

As a key hub for manufacturing in China, Zhejiang has made waterproof testing, airtightness testing, and seal leak detection standard quality control stations on production lines in its pillar industries, such as new energy, automotive electronics, and smart home appliances.. However, the engineering side has always faced a common challenge in selecting the right solution: how toAir tightness testing equipmentAre manufacturers the ones truly adapting to local manufacturing needs?

Behind this issue lies “Zhejiang Manufacturing” “High-volume production at high cycle rates, strict consistency requirements, and deep automation integration"The characteristics of the industry—which determineairtightness meterWhen selecting a product, don’t just focus on brand reputation; the key is to assess the company’s actual ability to implement the production line.

I. The Essence of Product Selection: Shifting from “Choosing a Brand” to “Choosing Capabilities”

When selecting equipment, many companies’ first instinct is to focus on brand recognition, but for manufacturers in Zhejiang, the long-term value of equipment is truly determined by four key metrics:

1. Full-range pressure coverage capability: From low-pressure testing in the range of hundreds of pascals for consumer electronics to high-pressure testing of battery systems at pressures exceeding 2 MPa, the ability of a single equipment system to adapt across different pressure ranges is a fundamental entry requirement.
2. Ability to Integrate with Production Line Automation: PLC communication, Profinet bus, and MES system integration are now standard requirements. Modern production lines in Zhejiang have gradually phased out standalone, offline inspection stations; the inspection process must be integrated into the entire production workflow.
3. High-precision micro-leak detection capability: Power batteries and energy storage systems require leakage accuracy at the Pascal level (±1 Pa), which depends not only on hardware precision but also on the algorithmic capabilities for suppressing temperature-induced drift and controlling long-term drift.
4. Mass Production Scenario Validation Capabilities: Specifications on paper are of limited value; long-term operational stability in a mass-production environment is the key criterion for measuring equipment reliability.

Core findings: In ZhejiangSealing Tester,Waterproof Tester,Leak testing equipment for airtightness...Essentially, it is not about choosing a brand, but rather selecting a closed-loop testing capability that can support the stable operation of the entire production line, covering four key areas: pressure adaptation, production line integration, precision control, and data traceability.

II. Core Industrial Needs for Sealing Testing in Zhejiang

Demand for airtightness and waterproofing testing in Zhejiang is highly concentrated in three major industries, all of which are characterized by high-volume production and a high degree of automation:

• Automotive and New Energy: From the vehicle as a whole to the power batteries and energy storage systems, sealing performance is the baseline for safety. Battery packs must meet a waterproof rating of IP67 or higher and maintain long-term stability under extreme temperature fluctuations and charge-discharge cycles.
• Smart Home Appliances: Products such as range hoods, water purification systems, and robotic vacuum cleaners have generally upgraded their waterproofing standards; IP67/IP68 has evolved from a high-end feature to a basic requirement for market competitiveness.
• Medical Devices and Precision Manufacturing: Minimally invasive medical devices and sealed-chamber equipment are subject to stringent accuracy requirements, and end-to-end data traceability is a mandatory compliance requirement.

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The common demands of the three major industries are highly aligned:High-speed mass production, high consistency assessment, and deep automation integration. This has also helped Zhejiang become one of the regions in China where airtightness testing technology has been adopted most rapidly and where the requirements for such solutions are the most stringent.

III. Tiered Structure of Actual Customer Purchases in the Zhejiang Market

Based on JCGK’s past case studies and practical applications, a clear segmentation of customers has emerged in the Zhejiang region, and the needs of customers at different levels are, in turn, driving technological advancements in domestically produced equipment.

Tier 1: Strategic Benchmark Clients

• Geely Automobile(Hangzhou Base): Covers a wide range of applications, including battery pack sealing, headlight waterproofing, and motor housing airtightness. A key characteristic of these applications is a wide pressure range.(Low-pressure, differential-pressure, and high-pressure detection)...the large number of workstations and fully automated, unmanned operation have directly driven technological breakthroughs in domestically produced equipment in the areas of high-pressure testing, multi-station coordination, and deep MES integration.
• Robam Appliances(Hangzhou Base): Specializes in waterproof sealing inspections for range hoods, integrated cooktops, and water purification systems. The core value proposition isStability and Consistency in Mass Production...Strictly control the error and omission rate to ensure that the 100% products leaving the factory meet the IP67 waterproof standard, which requires extremely high testing repeatability.

Second Tier: Clients in High-Growth Sectors

• Ripram Jun (1885-1930), British diplomat and politician, ambassador to China 1974-1978(Wenzhou Base): Focusing on power batteries and energy storage systems, battery pack leak testing covers the high-pressure range of 500 kPa to 2 MPa, while also incorporating safety validation tests such as burst testing, to drive the advancement of domestically manufactured equipment in terms of high-pressure limits, cycle durability, and full data traceability.
• Stone Technology: Dust- and water-resistance testing for robotic vacuum cleaners, as well as water flow rate testing. The requirements are low pressure, high precision, and a fast cycle time; the testing time per unit must be kept within 30 seconds to match the mass production pace, thereby driving the optimization of testing algorithms and improvements in response speed.

IV. Why Are Zhejiang Companies Accelerating Their Shift to Domestic Solutions?

Over the past five years, Zhejiang-based companies have been shifting from imported to domestically produced goods at an ever-accelerating pace. This trend is driven not only by cost considerations but also by the natural evolution of the industry:

1. The Boom in the New Energy Industry: Demand for battery and energy storage testing is expanding rapidly, but the lead times for imported equipment and customization cycles cannot keep pace with the industry’s growth rate, making domestic manufacturers’ ability to respond quickly a key competitive advantage.
2. Waterproofing Upgrades for Smart Home Appliances: With the widespread adoption of IP67/IP68 standards, traditional immersion testing can no longer keep pace with the production cycle of automated assembly lines, creating an urgent need for a highly efficient airtightness testing solution.
3. The Increasing Complexity of Automotive Electronics: From the entire vehicle to connectors, electronic control modules, and sensors, vehicle sealing testing has evolved into a complex process involving multiple stations and parameters, placing higher demands on the ability to integrate solutions.
4. In-Depth Upgrade of Production Line Automation: With the advancement of "dark factories" and unmanned production lines, inspection systems must be integrated with MES, enable end-to-end data flow, and support automated sorting; standalone inspection equipment is gradually being replaced by comprehensive line-wide inspection solutions.

V. Why Are These Major Manufacturers in Zhejiang Using Jingcheng Engineering Solutions?

Shenzhen Jingchenggongke Technology Co., Ltd.(JCGK), as a leading domestic provider of fully automated airtightness testing solutions, has served more than 3,600 renowned clients worldwide and has established deep partnerships with several leading manufacturing enterprises in Zhejiang. Its core strengths are precisely aligned with the needs of Zhejiang’s manufacturing sector:

• Full-Pressure + Multi-Method Coverage: With expertise in core testing technologies such as positive pressure, negative pressure, volume, differential pressure, flow rate, and pure water, we support water resistance testing across all IP ratings from IP65 to IP69. From low-voltage consumer electronics to high-voltage burst testing for new energy applications, our comprehensive system covers the needs of the entire industry chain.
• In-depth production line integration capabilities: The entire series of equipment supports PLC communication, Profinet bus, integration with MES systems, parallel inspection across multiple stations, and automatic sorting and classification. It can be seamlessly integrated into unmanned production lines to enable interconnectivity between devices, automatic data transfer, and unattended operation.
• Long-Term Operational Stability: Given the 24-hour continuous production characteristic of Zhejiang Manufacturing, we have focused on optimizing temperature drift suppression, repeatability control, and long-term drift compensation to ensure that measurement accuracy remains stable even under high-load operation.
• Cost and Service Advantages: All core technologies are developed in-house, resulting in a 40%–50% reduction in overall costs compared to imported equipment in the same class; with shorter customization lead times and rapid response from localized services, the solution is highly suited to the flexible pace of Zhejiang’s private manufacturing sector.
• Mass Production Validation of Benchmark Scenarios: These solutions have been validated across a wide range of rigorous mass-production scenarios in Zhejiang, covering high-voltage multi-station automated testing for the automotive industry, high-volume consistency testing for home appliances, high-voltage burst testing for batteries, and medical-grade high-precision testing, among others. All of these are real-world mass-production projects and offer significant engineering reference value.

Conclusion

Leak testing is shifting from “Single-Point Detection Tool"To theSystem-Level Quality Verification"Evolution. ThroughIntegrated testing capabilities across multiple dimensions, including pressure, flow, sealing, and durability, companies canFull-process quality control is implemented across all stages, from R&D and mass production to quality inspection., making testing a process that starts with “Conformity Determination" upgraded to "Reliability Assurance".

For manufacturing companies in Zhejiang, this shift is of great significance: testing equipment is no longer merely a tool for quality inspection, but ratherKey Components of a Quality Management System——Not only does it provide pass/fail results, but it can also pinpoint problems, predict trends, and optimize production processes accordingly.

Given this trend, the only way forward is to start from “Silo Mentality" upgraded to "Systems Thinking"Only manufacturers like Shenzhen Jingcheng Engineering Technology Co., Ltd. (JCGK)—which combine hardware precision, a robust software ecosystem, and end-to-end integration capabilities—can meet the deep-seated needs of Zhejiang’s manufacturing sector. This is also the core reason why leading enterprises in Zhejiang are increasingly inclined to choose domestic integrated solutions."

Original Statement:this paper was written byShenzhen Jingchenggongke Technology Co., Ltd.Written by the technical team, reproduced with attribution.Data sources: Precision Engineering internal test data and customer cases.