Gas Permeation Tester - Differential Pressure Method

BSG-33 /31 -G

Differential Pressure Gas Permeability Tester

    Gas Transmission Rate (GTR) Analyzer for High-Barrier Packaging and Functional Materials

Product Overview

The LabStone BSG Series Differential Pressure Gas Permeability Tester is a high-precision gas transmission analysis system designed for evaluating the gas barrier properties of films, sheets, laminates, metal foils, rubber materials, and high-performance packaging structures.

Based on the internationally recognized differential pressure method, the instrument accurately measures the transmission behavior of oxygen, nitrogen, carbon dioxide and other non-toxic gases through barrier materials.

The system provides comprehensive permeability analysis, including:

• Gas Transmission Rate (GTR)
• Gas Permeability Coefficient
• Diffusion Coefficient
• Solubility Coefficient
• Permeation Volume

making it an ideal solution for packaging manufacturers, pharmaceutical packaging suppliers, research institutes and testing laboratories.

Product Function:

Gas permeability performance testing: gas transmission rate, permeation amount, permeability coefficient, dissolution coefficient, diffusion coefficient. 

Applicable to the permeability performance testing of O2, CO2, N2, and other non-toxic gases for materials such as plastic films, composite films, high barrier materials, sheets, metal foils, rubber, and other materials.

Working Principle:

The BSG Series operates according to the Differential Pressure Method.

A specimen is mounted between a high-pressure chamber and a low-pressure chamber.

Both chambers are evacuated to a predefined vacuum level.

After stabilization:

• Test gas is introduced into the high-pressure chamber.
• A constant pressure difference is maintained across the specimen.

Gas molecules permeate through the material from the high-pressure side to the low-pressure side.

Highly sensitive pressure sensors continuously monitor pressure changes in the low-pressure chamber.

The software automatically calculates:

• Gas Transmission Rate (GTR)
• Gas Permeability Coefficient
• Diffusion Coefficient
• Solubility Coefficient

This method is especially suitable for medium- and high-barrier materials.

Compliant Standards: 
ASTM D1434
ISO 15105-1
JIS K7126-1
ISO 2556

GB/T 1038.1

Key Features

Differential Pressure Testing Technology

Widely recognized by international standards and regulatory organizations.

Suitable for:

• Oxygen permeability testing
• Carbon dioxide permeability testing
• Nitrogen permeability testing
• Specialty gas permeability testing

High-Sensitivity Vacuum and Pressure Sensors

Equipped with precision sensors for:

• Accurate vacuum measurement
• Stable pressure control
• Excellent repeatability

ensuring reliable permeability results.

Advanced Vacuum System

Features:

• Vacuum level below 10 Pa
• Rapid evacuation
• Efficient desorption

which significantly reduces testing uncertainty.

Anti-Leakage Sample Sealing Design

Patented specimen sealing structure minimizes:

• Side leakage
• Installation errors
• Measurement deviations

especially important when testing high-barrier materials.

Intelligent Baseline Compensation Technology

Patented background leak correction technology:

• Reduces system leakage influence
• Improves low-permeability measurement accuracy
• Enhances repeatability

Precise Temperature Control

Temperature range:15°C∼45°C

Temperature accuracy:  ±0.3°C

allowing simulation of various storage and transportation conditions.

Multiple Test Cell Configurations

BSG-31-G

• 3 test cells
• 1 vacuum sensor
• Manual specimen loading

Suitable for routine laboratory testing.

BSG-33-G

• 3 independent test cells
• 3 vacuum sensors
• Pneumatic specimen clamping

Designed for higher accuracy and improved testing efficiency.

Optional Humidity Control Module

Humidity control accessories enable advanced testing conditions required by pharmaceutical and specialty packaging applications.

GMP Data Integrity Support

Optional GMP Computerized System software module supports:

• User management
• Permission control
• Audit trails
• Electronic records
• Data integrity compliance

Ideal for regulated industries.

Technical Specifications

Standard Configuration: Testing mainframe, vacuum pump, testing software, sampler, computer, vacuum bellows, gas cylinder pressure reducing valve and fittings, sealing grease. 

Optional Accessories:Container testing fixture, humidity control unit. 

Self-supplied: Test gas and gas cylinders.

Why Gas Barrier Testing Matters

Gas transmission directly affects product stability, shelf life and performance.

Poor gas barrier properties may result in:

Food Packaging

• Oxidation
• Flavor deterioration
• Nutrient loss
• Reduced shelf life

Pharmaceutical Packaging

• Drug degradation
• Reduced efficacy
• Moisture and oxygen sensitivity issues

Electronic Materials

• Component corrosion
• Performance degradation

Industrial Barrier Materials

• Reduced protection capability
• Lower product reliability

Accurate gas permeability testing is therefore critical for material qualification and quality assurance.

Typical Applications

High-Barrier Packaging Films

Suitable for evaluating:

• EVOH films
• PVDC films
• Aluminum-coated films
• Multi-layer laminates
• Vacuum packaging materials

Pharmaceutical Packaging Materials

Applicable to:

• Blister packaging
• Pharmaceutical composite films
• Medical pouches
• Drug packaging laminates

Supports packaging validation and stability studies.

Flexible Packaging Industry

Used for:

• Packaging material development
• Supplier qualification
• Quality control
• New structure evaluation

Industrial Functional Films

Suitable for:

• Protective membranes
• Barrier coatings
• Specialty films
• Industrial composite materials

Research and Academic Laboratories

Widely used for:

• Gas diffusion studies
• Barrier mechanism research
• Material comparison projects
• Product development
   

Industries Served

The BSG Series is widely used by:

• Packaging Film Manufacturers
• Pharmaceutical Packaging Manufacturers
• Food Packaging Suppliers
• Barrier Material Producers
• Medical Packaging Companies
• Research Institutes
• Universities
• Government Laboratories
• Third-Party Testing Laboratories

Frequently Asked Questions (FAQ)

What gases can be tested?

The instrument can test:

• Oxygen (O₂)
• Carbon Dioxide (CO₂)
• Nitrogen (N₂)
• Other non-toxic gases

What is the differential pressure method?

The differential pressure method measures gas transmission by monitoring pressure changes across a specimen under controlled vacuum conditions.

Is this instrument suitable for high-barrier materials?

Yes. The system is specifically designed for medium- and high-barrier packaging materials.

Can pharmaceutical packaging materials be tested?

Yes. The instrument is widely used for pharmaceutical packaging validation and quality control.

What is the difference between oxygen permeability and gas permeability testing?

Oxygen permeability measures only O₂ transmission, while gas permeability testing can evaluate multiple gases including O₂, CO₂ and N₂.

Can humidity-controlled testing be performed?

Yes. An optional humidity control module is available.

Why is vacuum quality important?

High vacuum levels reduce residual gas interference and improve measurement accuracy.

What is the benefit of the three-sensor version?

Independent vacuum monitoring improves chamber consistency and overall test reliability.

Does this product have other names?

English

• Gas Permeability Tester
• Gas Transmission Rate Tester
• Differential Pressure Gas Permeability Tester
• GTR Analyzer
• Gas Barrier Tester
• Gas Permeation Tester
• Packaging Gas Permeability Tester
• Oxygen and Carbon Dioxide Permeability Tester

Spanish

• Analizador de Permeabilidad a Gases

Portuguese

• Testador de Permeabilidade a Gases

French

• Analyseur de Perméabilité aux Gaz

German

• Gasdurchlässigkeitsprüfgerät

Japanese

• 差圧法ガス透過率試験機