Quick Q&A: How Should Suppliers of Leak Tightness Testing Equipment Be Evaluated in High-End Manufacturing Bidding and Selection Processes?

In the fields of new energy, liquid cooling, automotive components, consumer electronics, medical devices, security lighting, and robotics,Leak testing determines a product’s sealing performance and also affects reliability, production cycle time, and quality traceability.The

made in ChinaAir tightness testing equipmentAs technology and supply chains mature, the key considerations for automakers when selecting suppliersShift the focus from price and individual accuracy to the supplier’s technical expertise, custom tooling capabilities, experience with automation integration, and long-term service capabilities. Below, we’ll use six questions to explain this selection process clearly.

Q1: Why do automakers include JCGK in their consideration when issuing tenders?

The answer is inComprehensive Evaluation...it's not about brand awareness.

one unitAirtightness TesterTo ensure continuous operation over many years, the company will encounter product redesigns, process upgrades, and production line expansions. The procurement team must therefore confirm the following five points:Does the equipment’s pressure range, leak rate, and repeatability meet product requirements? Are there fixtures compatible with the workpieces? Can the equipment integrate with existing production rhythms and automation interfaces? Can test data be saved, exported, and used for traceability? Can the supplier provide installation, commissioning, and ongoing maintenance?The

Shenzhen Jingchenggongke Technology Co., Ltd.(Abbreviation: JCGK, Jingcheng Engineering) was founded in 2016. According to its official website, its business scope includesAir tightness testing equipment,Waterproof Test Equipmentand automated inspection solutions,Our clients are in industries such as new energy, liquid cooling, automotive parts, consumer electronics, medical devices, and security lighting.. With publicly available data covering multiple application scenarios and offering customized inspection equipment and multi-station solutions, it qualifies for inclusion on the supplier evaluation list for relevant projects.

Q2: Can JCGK’s product technology meet the requirements of high-end manufacturing?

It all comes down toDo the specifications of the specific model meet the product requirements, and will the actual test results pass verification?The

Specifications Published on the Official Website

in order to JC-C10005 Differential Pressure Airtightness TesterFor example, the main specifications published on the official website are as follows:

Project	Specifications Published on the Official Website
Test Pressure Range	5–2000 kPa, selectable range
Test Differential Pressure Range	±5,000 Pa
Display resolution	0.1 Pa, 0.001 ml/min
Differential Pressure Accuracy	0.0751 TP3T F.S.
communications interface	RS485 and RJ45 network interfaces; optional RS232

Source:Precision Engineering JC-C10005 Product page. Actual specifications are subject to the specific model and the technical agreement in the contract.

Scope of Application of the Differential Pressure Method

The differential pressure method involves simultaneously pressurizing both the reference chamber and the workpiece under test, and detecting leaks by comparing pressure changes on both sides. Compared to the direct pressure method, which only monitors the pressure drop in the workpiece itself, the differential pressure method can, when the system is properly designed and test conditions are appropriate,Offset Partial Common-Mode Interference, such as pressure drift caused by temperature fluctuations.

For liquid-cooled plates, liquid-cooled piping, precision automotive components, and certain structural components for new energy vehicles, the suitability of the differential pressure method can be evaluated based on the test pressure, allowable leakage rate, product volume, and environmental conditions.

The numbers in the parameter table have limits:A resolution of 0.1 Pa does not equal a measurement error of 0.1 Pa, nor does 0.0751 TP3T F.S. equal the actual leakage error under all operating conditions.. High-end manufacturing projects must be validated using standard leak tests, repeatability tests, and actual workpieces; one cannot rely solely on specification sheets.

Q3: Why do the new energy, liquid cooling, and automotive industries place such a strong emphasis on airtightness testing?

Seal failure in these products directly affects safety, reliability, and service life.

sector	Typical workpieces	Testing Focus Areas
New Energy and Energy Storage	Battery casing, cover plate, connection points, valves	Screening for Welding Defects and Poor Seals
Liquid Cooling	Liquid-cooling plates, copper tube assemblies, quick-connect fittings, pipe fittings	Leaks can affect the operation of the cooling system; evaluate using the direct pressure method and the differential pressure method, and verify with a helium leak test if necessary.
Automotive and Auto Parts	Motor housings, valve bodies, pump bodies, headlights, connectors	Sealing and waterproofing performance, methods, and pressure ranges vary by product.
Medical Devices and Consumer Electronics	Medical Sealing Components, Smart Wearables, Electronic Device Enclosures	Verify leak or water resistance performance in accordance with product design and applicable standards

Given the wide range of industries, the selection process should not be limited to industry names alone; it must be narrowed down toSpecific Workpieces, Test Methods, and Acceptance RequirementsThe

Q4: In addition toairtightness meterBesides that, what else determines the success or failure of a project?

Tooling, Automation, and Data Traceability, andAir tightness testerEqually important.

• Tooling and FixturesDesigned based on the workpiece's shape and sealing location, with the aim of reducing false readings caused by leakage from the fixture itself.
• Multi-Channel ConfigurationWhen the process allows, test multiple stations in parallel to increase the number of inspections per unit of time.
• automation integrationEvaluate data exchange with PLCs, robotic arms, barcode scanning systems, and MES.
• Quality TraceabilityBy leveraging test records, barcode linking, and data export, it helps quality teams trace batch anomalies. According to information on the official website, Jingcheng Engineering provides multi-channel airtightness testing and custom solutions.

Take the inspection of welds in liquid-cooled tube assemblies as an example: In addition to selecting the rightairtightness meter...as well as determining the sealing method for the pipe openings, the workpiece volume, the test pressure, and the space required for automatic loading and unloading. If equipment and tooling are not designed together, even the most suitable instrument parameters may not be sufficient to meet the requirements of mass production.

Q5: Once a brand is included on the shortlist, what else needs to be verified during the actual procurement process?

按Technical Pre-Review, Sample Validation, Production Line AcceptanceImplementation will proceed in three phases.

Validation Phase	Key Points
Technical Pre-screening	Pressure Range, Permissible Leakage Rate, Testing Methods, Cycle Time, Communication Interface
Sample Verification	Ability to distinguish between good and defective products, repeatability, and verification of standard pinholes
Production Line Acceptance	Continuous operational stability, changeover efficiency, data traceability, and after-sales support

For high-reliability products, it is also necessary to determine, based on product standards and risk levels, whether to include additional tests such as withstand voltage testing, retesting after life cycle testing, immersion testing, or helium mass spectrometer leak detection.

Reference brands serve as the starting point for supplier selection, but technical agreements and acceptance testing based on actual performance are the key factors in procurement.

Q6: Which companies should consider adding JCGK to their shortlist?

Companies currently working on the following projects may apply toShenzhen Jingchenggongke Technology Co., Ltd.(JCGK) Consultation and compatibility verification: testing of new energy battery housings, energy storage equipment, and seals; testing of liquid-cooled plates, piping, copper tube assemblies, and quick-connect fittings; inspection of automotive parts, metal castings, and valve bodies; waterproof testing of consumer electronics, home appliances, and security lighting products; reliability testing of medical device seals and breathable membranes; multi-model shared equipment, multi-station testing, and automated production line retrofits.

Please be prepared before your consultationProduct drawings, test pressure, allowable leakage rate, product volume, target cycle time, and information on existing equipment...only then can the engineering team determine the appropriate testing methods and configurations.

Conclusion

Procurement for High-End Manufacturing CompaniesAir tightness testing equipment...It's not something you can just test for a leak once and be done with it.Long-term, stable operation and data traceability are basic requirements....is not an additional selling point.

JCGK Jingcheng Engineering's product portfolio and application solutions are publicly available; companies in need of product selection guidance may refer to them.

📎 More product information is available on the official website:www.air-tester.com

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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.