Smart watches are no longer just simple timing tools. They can monitor heart rate, blood oxygen, exercise, and message reminders... They have almost become a "personal butler" on our wrists.However, real real-life tests such as hand washing, sweating, rain, and swimming that are often encountered in daily wear make "waterproof" a hard indicator.

IPX8: Not just “waterproof”

The IPX8+5ATM (or higher) we often see in the parameters of smart wearable products is the shell protection level standard set by the International Electrotechnical Commission (IEC). Its requirements are:

Generally, product performance will not be affected by continuous immersion in water (1.5 meters to 30 meters) for 60 minutes.

To put it simply, the IPX8 rating emphasizes sealing under dynamic water pressure, which far exceeds daily splash resistance. It can calmly handle usage scenarios such as hand washing, rain, and swimming, providing users with reliable protection.

Invisible test: air tightness test

"Waterproof" is not simply a matter of sealing, but needs to be verified through a rigorous and quantitative testing process.Hirays ensures the sealing of smart watches through the following key links:

01 Middle frame incoming material air tightness test

Check the sealing of the buttons and middle frame to prevent sweat and dust from intruding through the gaps.

02 Front shell assembly air tightness test

Verify whether the sealing of the middle frame buttons and TP glue is qualified to eliminate the risk of water seepage at the edges.

03 Back shell incoming air tightness test

Check the sealing degree of the heart rate mirror and charging needle to ensure reliable sealing in the core area.

04 Air tightness test of rear shell assembly

Check the sealing of the heart rate mirror, charging needle, speaker, and barometer to protect the accuracy of the health monitoring function.

core technology

Semi-finished products in the above steps are tested using high and low pressure air tightness testing methods. HC/HD high-precision differential pressure instruments can be used to accurately capture small leaks by setting strict pressure and leakage value ranges.

⬆ HC Classic Series Air Tightness Detector

⬆ HD Ingenuity Series Air Tightness Detector

*Adjust appropriately based on the actual verification value of the precision machine

05 Real water test on the balance hole and MIC hole of the rear shell

For waterproof and breathable membranes with "breathable and impermeable" properties, the real water test method is used for verification.Under a pressure of about 50kPa, observe whether water penetrates to determine whether the waterproof performance of the membrane meets the standard.

*Test threshold: -20Pa~80Pa (specifically, it can be adjusted according to the actual verification of the precision machine)

⬆HW true water detector

06 Battery leak detection

For smart watch battery leakage detection, the HV-110VOCs detector can be used. It is based on the PID photoionization detection principle and has the characteristics of integrated design, data analysis and 1ppb level high resolution. It can meet the "small size, high integration, strict standards" detection requirements of smart watches.

⬆  HV-110VOCs detector 

07 Whole machine air tightness test

Simulate real usage scenarios and conduct final inspection of finished products.Before testing, a "large leak test" will be performed to eliminate obvious defects, and then a micro leak test will be performed to ensure that the entire machine is safe and sound in various environments.

*Adjust appropriately according to actual mold cavity size

Intelligent wearable automated detection equipment

08 Defect detection (Debug)

In order to improve the yield rate, special fixtures are equipped to quickly locate leak points and help engineers perform targeted process optimization.

Customer value: one-stop sealing testing solution

The core value that Hirays’ sealing testing solution brings to smart watch manufacturers is:

1 High precision and stability

The use of high-precision sensors, combined with customized test platforms, fixtures, and sealing silicone, ensures stable and reliable test results, effectively reduces misjudgments and missed diagnoses, and protects product yield.

2 Self-developed core technology

The core components are modularly produced with excellent performance, ensuring high-precision detection while taking into account high cost performance.

3 Full process coverage

The solution covers all key inspection points from components to complete machines, solving approximately 99% of air tightness inspection problems in one stop.

4 Seamless connection with automated production lines

Supports connection to MES systems, can flexibly match customers' existing production lines, and effectively improves detection efficiency and product delivery capabilities.

5 Full life cycle service

Provide prototype trial, professional Q&A and training, covering the whole process of pre-sales, sales and after-sales, so customers can use it worry-free.

Work together for a win-win situation and safeguard quality

As the world's leading one-stop sealing testing solution service provider, Hirays has been deeply involved in new energy, 3C consumer electronics and other fields for nearly 20 years. Its technical strength and service level have been recognized by leading companies around the world, and it has accumulated 3,000+ mature cases.

Whether you are in the product development or mass production stage, Hirays will become your long-term partner to improve product quality and competitiveness with professional and customized testing solutions.