Why do mobile phone lenses need sealing tests?

As smartphones enter the multi-camera era, camera modules are becoming increasingly sophisticated and compact. A flagship phone's rear camera module typically contains 3 to 5 lenses, plus precision components such as sensors, voice coil motors, optical filters, and FPCs, resulting in an extremely complex structure.

Throughout the entire mobile phone production process,The sealing performance of camera modules is a critical factor determining the waterproof performance and long-term reliability of mobile phones.。

Common hidden risks of lens seal failure

Poor sealing between the lens and the lens holder

Moisture ingress causes lens fogging and blurred imaging.

Voice coil motor poor sealing

Focus failure, affecting the shooting experience

Sensor package leak

Circuit short circuit, increased image noise

Overall module air tightness does not meet the standard.

Unable to pass IP67/IP68 waterproof certification

💡 Industry data:A mobile phone camera module has about 30+ glue points, and sealing failure at any single point will cause the waterproof rating of the entire device to fall short of the standard.

Especially inAutomotive cameras, security cameras, action camerasIn scenarios such as these, the lens is exposed to high temperature, high humidity, and dusty environments over the long term, and its sealing performance directly determines the product's service life.

Three major pain points in mobile phone lens sealing tests

Pain Point 1Precision components require non-destructive testing

Mobile phone lens components are extremely precise—the lens surface must not be touched, and the threads must not be damaged. TraditionalWater immersion test (immersion testing)Although intuitive, it is a destructive test:

After the water test, the unit must be disassembled and dried before a judgment can be made.
Residual moisture can corrode internal circuits.
Extremely low efficiency, unable to keep up with production line takt time

Solution:AdoptedAir tightness testerPerform non-destructive air pressure testing without contacting the product or leaving any residual media.

Pain Point 2Small size, high precision requirements

Mobile phone camera modules are small in size (typically only a few cubic centimeters), and their leak rates are extremely low. Ordinary pressure sensors struggle to distinguish such minute pressure changes.

Requirement Item	Specifications
Sensor resolution	0.1 Pa level
Test pressure	10~500 kPa (low-pressure testing)
Test cycle time	Within 15 seconds

Pain Point 3Semi-finished and finished products have different testing requirements.

Mobile phone lens production is divided into two stages:

Stage	Test object	Test Method	Recommended Equipment
Semi-finished product testing (in-process)	Single lens assembly, unpackaged module	Directly testing component sealing performance using the differential pressure method	X530 High-Precision Differential Pressure Leak Detector
Finished product testing (pre-shipment)	Assembled lens module + complete unit	Volumetric differential pressure method (compensating for volume change)	X530-R Volumetric Differential Pressure Leak Detector

Recommended solution: X530 + X530-R combined testing solution

PLUS X530 High-Precision Differential Pressure Leak Detector

🎯 Dedicated to In-Process Testing

X530 is a standard differential pressure leak detector launched by PLUS. After years of market validation, it is widely used in sealing tests for consumer electronics.

Key Parameters

Sampling accuracy	24bit
Differential pressure sensor range	±500 / ±1000 / ±5000 Pa
Parameter set	99 sets
Interface	8 IN / 8 OUT IO，RS232，TCP/IP
Display screen	5-inch color touchscreen
Power supply	220 VAC / 50 W
Volume	250×300×160 mm
Weight	2.5 kg

Applicable scenarios

🔹Sealing Test for Mobile Phone Lens Module Manufacturing Process
🔹Single-station/dual-station rapid testing
🔹Automatically determines pass/fail in conjunction with the sealing fixture
🔹Data can be uploaded to the MES system for traceability.

✅ CE Certification(Certificate No.: M.2024.206.C99088)

PLUS X530-R Volumetric Differential Pressure Leak Detector

🎯 Dedicated for Finished Product Testing

X530-R is an upgraded version of the X530, featuringVolumetric differential pressure testing principle, specifically designed for testing finished packaged parts and products with volume changes.

Core Advantages

✅Compensates for volume differences in the test piece, making test results more accurate
✅Suitable for testing already-packaged lens modules (no need to contact the interior)
✅Ensure the IP67/IP68 waterproof rating of finished products at shipment.

Typical Applications

🔹Finished lens module sealing spot-check
🔹Complete machine camera area waterproof test
🔹Final inspection process of mass production lines

Test Process Overview

[Semi-finished stage] → X530 + sealing fixture → differential pressure test → pass/fail judgment ↓ [After finished product assembly] → X530-R + volume compensation → finished product sealing test → shipping

PLUS (Guangzhou) Intelligent Technology Co., Ltd.

PLUS (Guangzhou) Intelligent Technology Co., Ltd.Founded in 2018, with over 10 years of technical expertise in the sealing test field, we are an enterprise integrating technology development, production, and sales.High-Tech Enterprise。

Company Qualifications and Honors

High-Tech Enterprise— National High-Tech Enterprise
CE Certification— Certificate No.: M.2024.206.C99088
ISO certification– ISO Quality Management System certification in both Chinese and English
Patents & Software Copyrights— 15 utility model patents, 3 software copyrights, 3 trademarks
CTS Authorized Agent— Official Sales Authorization Letter for US CTS Leak Detectors (2026)

Company Focus Areas

Consumer electronicsMobile phones, smartwatches and fitness bands, camera modules, earphones, tablets
New EnergyBattery pack, energy storage cabinet, charging pile, connector
Automotive ManufacturingIn-vehicle camera, LiDAR, wiring harness, sensor
Medical devicesSyringe, test cassette, breathing tube
Security CommunicationsSecurity cameras, communication base station equipment

Core Advantages

✅ Own-brand + agency dual-line operation:PLUS own brand + US CTS agency, more flexible solutions
✅ 200+ Customer Cases: Covering multiple fields including automotive, new energy, and 3C consumer electronics
✅ Rapid Customization Service: Customized sealing fixtures and test solutions are available based on product characteristics.
✅ Nationwide Service: Guangzhou headquarters + Suzhou office, fast after-sales response