1. Product Overview

The gas permeability tester is a professional precision testing instrument designed to evaluate the gas barrier properties of various flexible and rigid materials. It accurately measures the gas transmission rate (GTR), diffusion coefficient, solubility coefficient and permeability coefficient of oxygen, carbon dioxide, nitrogen and other gases through standardized testing principles. As a core quality control device in material barrier performance analysis, it provides reliable, repeatable and traceable test data for industrial R&D, quality inspection and batch production supervision.

Widely adaptable to diverse material types, the instrument covers plastic films, composite packaging materials, aluminum foil sheets, rubber products, separation membranes, paper-based barrier materials and new energy functional materials. It is an essential testing tool for industries that rely on stable gas barrier performance to ensure product quality and shelf-life stability.

2. Testing Principle

This gas permeability tester adopts the mature and authoritativedifferential pressure method, which complies with global mainstream testing standards. The testing process follows rigorous physical testing logic to ensure high accuracy and stability:

First, place the pre-treated flat test sample in the sealed test chamber to divide the chamber into an upper gas supply cavity and a lower vacuum cavity. After fully vacuumizing the lower cavity to eliminate residual gas interference, inject the target test gas with stable pressure into the upper cavity. Driven by the pressure difference on both sides of the sample, the gas molecules penetrate through the material barrier layer to the low-pressure cavity. The high-precision pressure sensor real-timely monitors the pressure change of the lower cavity, and the system automatically calculates the gas transmission rate and core barrier parameters of the sample through professional algorithms.

Compared with other testing methods, the differential pressure method features strong gas compatibility, wide test range and stable data output, suitable for conventional and ultra-high barrier material testing scenarios.

Testing equipment：GTR-V3 Air permeability tester (differential pressure method)

3. Core Features & Technical Advantages

3.1 High Testing Accuracy & Stability

Equipped with imported high-precision vacuum pressure sensors, the instrument achieves ultra-low detection limits, supporting accurate testing of ultra-high barrier materials. Adopting 360° constant-temperature air circulation technology and an optimized integrated test chamber structure, it effectively eliminates temperature fluctuation and air leakage interference, ensuring excellent data stability and repeatability. The test data error is controlled within ±0.5% of the reading, meeting strict industrial precision requirements.

3.2 Full Standard Compliance

The instrument fully conforms to international and domestic authoritative testing standards, including ISO 15105-1, ASTM D1434, GB/T 1038 and other mainstream specifications. All test procedures, data calculation methods and result reports are standardized, enabling cross-industry and cross-border data recognition and meeting the quality inspection and certification requirements of global enterprises.

3.3 Intelligent & Efficient Operation

Built-in intelligent microprocessor control system realizes fully automatic testing processes including vacuuming, gas injection, pressure stabilization, data acquisition and result calculation. The high-definition display interface visualizes real-time test curves, pressure changes and parameter data. It supports one-click report generation, data storage and export, greatly reducing manual operation errors and improving testing efficiency. Multiple test modes are optional to adapt to different material characteristics and test demands.

3.4 Wide Application Compatibility

It supports testing of multiple gases such as O₂, CO₂, N₂ and air, and is compatible with materials of different thicknesses and barrier levels from low barrier to ultra-high barrier. The adjustable test temperature and humidity modules can simulate various actual service environments, realizing barrier performance evaluation under diverse working conditions and restoring the real application state of materials.

4. Main Application Industries

4.1 Food & Beverage Packaging

Gas barrier performance is the key factor determining the shelf life of food products. The tester is widely used for quality testing of food packaging films, vacuum packaging materials and modified atmosphere packaging materials. By detecting oxygen and carbon dioxide permeability, it effectively avoids food oxidation, mildew and deterioration, and ensures food freshness and safety during storage and transportation.

4.2 Pharmaceutical & Medical Packaging

For medical blister packaging, pharmaceutical packaging films and medical rubber accessories, stable gas barrier performance prevents external gas from penetrating and contaminating drugs, ensuring the efficacy and safety of pharmaceutical products. The instrument provides accurate data support for pharmaceutical packaging material selection and quality verification, meeting strict medical industry quality standards.

4.3 New Energy & Electronic Industry

In the new energy field, it tests the barrier performance of battery packaging films and isolation membrane materials to prevent gas penetration from affecting battery safety and service life. In the electronic industry, it is used for barrier detection of precision electronic packaging materials, avoiding component oxidation and damage caused by gas erosion.

4.4 Rubber & Industrial Materials

It is applicable to gas permeability testing of tire rubber, sealing rubber parts and industrial barrier films. It helps enterprises evaluate the air tightness and durability of rubber products, optimize material formulas, and improve product safety and service life in industrial and automotive application scenarios.

5. Product Value

Relying on precise testing technology and stable performance, our gas permeability tester helps enterprises strictly control raw material incoming quality, optimize material formula design, and verify finished product barrier performance. It effectively solves the problems of unstable product quality and short shelf life caused by unqualified gas barrier properties. With intelligent operation, standardized testing and reliable data output, it provides professional one-stop barrier performance testing solutions for global manufacturing and testing institutions, helping enterprises improve product competitiveness and meet international market access standards.