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Key: test item, instrument name, total nonvolatile migration, gravimeter, moisture permeameter

Product

6-Cavity Gas Permeation Tester-Differential Pressure Method

Focusing on packaging and material testing technology, we are committed to quality control in industries such as healthcare, pharmaceuticals, food, packaging, textiles, and new materials. Our products are widely used in enterprises, testing institutions, universities, and research institutes.

Category:

Gas/Oxygen Permeation Analyzer

GTR Tester- Differential Pressure Method

Gas Permeation Tester - Differential Pressure Method

6‑Cavity Parallel Oxygen / CO₂ / N₂ Transmission Tester

Overview

The LabStone BSG‑66‑G is a high‑throughput 6‑cavity gas permeation tester based on the differential pressure method. Designed for R&D and QC laboratories requiring rapid, precise barrier property characterization, it simultaneously measures the gas transmission rate (GTR), permeability coefficient, diffusion coefficient, and solubility coefficient of up to six distinct specimens.

Fully compliant with ASTM D1434, ISO 15105‑1, JIS K7126‑A, and Chinese Pharmacopoeia standards, the BSG‑66‑G is the ideal solution for evaluating the barrier performance of high‑barrier films, laminates, metallized webs, and rigid packaging materials across pharmaceutical, food, electronics, and new energy industries.

Key Applications

Pharmaceutical Packaging

Blister Pack Films: O₂ transmission rate (OTR) testing of PVC/PVDC, Aclar®, and cold‑form laminates for moisture‑ and oxygen‑sensitive APIs.

Medical Device Pouches: CO₂ and N₂ permeability of Tyvek® and multilayer coextrusions.

Regulatory Compliance: Pharmacopoeia‑mandated gas permeability testing for primary packaging materials (YBB 00082003).

Food & Beverage Packaging

Modified Atmosphere Packaging (MAP): O₂ and CO₂ barrier evaluation of PA/PE, EVOH‑barrier, and PET films.

Vacuum Packaging: Long‑term shelf‑life prediction based on O₂ ingress rates.

High‑Barrier Laminates: Aluminum‑foil‑based structures for retort and aseptic packaging.

Electronics & New Energy

Lithium‑Ion Battery Separators: O₂ and CO₂ permeability of PP/PE separators affecting battery safety and cycle life.

Flexible Electronics: Barrier films for OLED encapsulation and thin‑film photovoltaics.

Industrial & Specialty Films

Metalized Films: Pin‑hole and defect detection via gas permeation mapping.

Rubber & Elastomers: Gas diffusion and solubility characterization for automotive and aerospace seals.

Measured Parameters:

Gas Transmission Rate (GTR)

Gas Permeability Coefficient

Diffusion Coefficient

Solubility Coefficient

Working Principle

The BSG‑66‑G employs the differential pressure method in accordance with ASTM D1434 and ISO 15105‑1:

Specimen Mounting: Six test specimens are independently clamped between the high‑pressure chamber and low‑pressure chamber using a pneumatic clamping system. Each cavity is fully isolated.

Dual‑Chamber Evacuation: Both high‑ and low‑pressure sides of all six cavities are simultaneously evacuated to a vacuum level below 10 Pa, ensuring complete removal of residual gases and adsorbed moisture.

Pressure Differential Establishment: The low‑pressure side is isolated (sealed), while the high‑pressure side is charged with the test gas (O₂, CO₂, N₂, or other) to a preset pressure (0.1 - 0.2 MPa). A constant pressure differential is maintained throughout the test.

Permeation Measurement: Gas molecules diffuse through the specimen from the high‑pressure side to the low‑pressure side. The rate of pressure increase in the low‑pressure chamber is precisely measured by a high‑accuracy vacuum sensor (0.1 Pa resolution).

Data Calculation: The system calculates GTR, permeability, diffusion, and solubility coefficients based on the steady‑state pressure rise, specimen area, thickness, and temperature.

Compliance Standards:

ASTM D1434: Standard Test Method for Determining Gas Permeability Characteristics of Plastic Film and Sheeting

ISO 15105‑1: Plastics - Film and sheeting - Determination of gas transmission rate - Part 1: Differential pressure method

ISO 2556: Plastics - Determination of the gas transmission rate of films and thin sheets under atmospheric pressure - Manometric method

JIS K7126‑A: Testing method for gas permeability of plastic film and sheeting - Part A: Differential pressure method

Chinese Pharmacopoeia (ChP) Vol. IV: Method for Determination of Gas Permeability

YBB 00082003: Test method for gas permeability of laminated films for pharmaceutical packaging

GB/T 1038: Plastics - Determination of gas permeability - Differential pressure method

Key Features

6‑Cavity Parallel Testing

Six independent test stations allow simultaneous measurement of six different materials or six replicates of the same material, increasing throughput by up to 6× compared to single‑cavity instruments.

High‑Precision Vacuum Sensing

Equipped with six independent imported high‑accuracy vacuum sensors (0.1 Pa resolution). Each cavity has dedicated sensing, eliminating cross‑interference and enabling independent test termination.

Patented Baseline Subtraction Technology

Proprietary algorithm identifies and subtracts system background leakage, removing measurement bias caused by valve seals or piping permeation. This is critical for ultra‑high‑barrier materials (OTR < 0.01 cm³/m²·day).

Pneumatic Specimen Clamping

One‑touch pneumatic clamping secures specimens in under 60 seconds. The system applies uniform pressure to prevent edge leakage while protecting delicate films from mechanical damage.

Anti‑Side‑Leakage Design

Precision‑machined sealing surfaces and optimized O‑ring geometry eliminate lateral leakage paths, ensuring that all measured gas flow originates from permeation through the specimen.

Semiconductor Bidirectional Temperature Control

Integrated thermoelectric (Peltier) heating and cooling provides precise temperature control from 15 - 50°C (±0.1°C) without compressors or refrigerants. Optional extended range (5 - 95°C) available.

High‑Speed Vacuum System

Optimized valve and piping design achieves < 10 Pa within 60 minutes. Rapid evacuation reduces total test time - high‑barrier films in < 24 h, medium/low‑barrier films in < 6 h.

Environmentally Independent

Built‑in temperature control and stabilized pressure regulation mean the instrument does not require a constant‑temperature/humidity laboratory, significantly reducing facility costs.

Intelligent Diagnostics

Automatic self‑check at startup detects sensor faults, vacuum leaks, or abnormal pressure trends before testing begins, preventing wasted samples and time.

GMP‑Ready (Optional)

Optional Computerized System Module provides user management, role‑based access control, electronic signatures, and audit trails compliant with 21 CFR Part 11 and NMPA GMP.

Dual‑Area Test Cells (Standard)

Includes both 38.48 cm² (standard) and 7 cm² (small‑area) test cells, extending the measurable range from 0.01 to 2,500,000 cm³/m²·day·0.1MPa - covering everything from ultra‑barrier EVOH to porous membranes.

Technical Specifications:

Parameter	Specification
Measurement Range	Large area (38.48 cm²): 0.01 - 500,000 cm³/m²·day·0.1MPa Small area (7 cm²): 0.05 - 2,500,000 cm³/m²·day·0.1MPa
Test Accuracy	0.01 cm³/m²·day·0.1MPa
Vacuum Accuracy	0.1 Pa
Vacuum Range	1333.33 Pa
Final Vacuum Level	< 10 Pa (attainable in ≤ 60 min)
Temperature Range	15 - 50 °C (5 - 95 °C optional)
Temperature Accuracy	±0.1 °C; uniformity ±0.5 °C
Test Area	38.48 cm² / 7 cm² (dual‑cell standard)
Sample Thickness	≤ 3 mm
Test Gas	O₂, N₂, CO₂, and other non‑corrosive gases
Gas Pressure (High Side)	0.1 - 0.2 MPa
Supply Gas Pressure	0.1 - 0.8 MPa (user‑provided)
Gas Interface	Φ6 mm
Calibration Method	Stainless steel shim + certified reference film (2‑point calibration)
Number of Test Stations	6 (independent)
Number of Vacuum Sensors	6 (one per station)
Clamping Method	Pneumatic (automatic)
Test Duration	High‑barrier: < 24 h; Medium/Low‑barrier: < 6 h
Power Supply	AC 220V, 50Hz
Power Consumption	< 2000 W
Dimensions (L×B×H)	700 × 740 × 470 mm
Net Weight	Approx. 130 kg

Standard Configuration

Main testing unit (BSG‑66‑G host)
Vacuum pump
Professional testing software
Desktop computer
Sample cutter
Filter papers
Vacuum bellows
Gas cylinder regulator and fittings
Vacuum grease
Calibration kit (stainless steel shim + reference film)

Optional Accessories

Container Test Fixtures (for finished packages)
Extended Temperature Controller (5-95°C)
Humidity Control Unit (for humidified gas testing)
Tablet PC (for portable operation)
GMP Computerized System Module

User‑Provided Items

Test gas cylinders (O₂, CO₂, N₂, or other)
Compressed air or nitrogen supply (> 0.8 MPa)

Frequently Asked Questions (FAQ)

Q1: What is the advantage of 6 independent cavities over a single‑cavity system?

A: Six independent cavities allow you to test six different materials simultaneously or run six replicates of the same material in a single run. This is especially valuable for high‑barrier films, where a single test can take 24+ hours. A 6‑cavity system effectively multiplies your lab's throughput by sixfold.

Q2: Can I test different gases in different cavities at the same time?

A: All six cavities share a common gas inlet manifold, so they must be exposed to the same test gas during a single run. However, you can run O₂ in one batch, then CO₂ in the next, without recalibrating the instrument. For truly simultaneous multi‑gas testing, we recommend running sequential batches.

Q3: What does "baseline subtraction technology" mean?

A: Every permeation system has a small amount of background leakage through valves, seals, or piping. Our patented algorithm measures this baseline (with a stainless steel blank installed) and subtracts it from the sample signal. This is essential for accurately measuring ultra‑high‑barrier materials with OTR values below 0.1 cm³/m²·day.

Q4: How long does it take to test a typical high‑barrier EVOH film?

A: For a high‑barrier EVOH film (OTR ≈ 0.01-0.05 cm³/m²·day), expect 16-24 hours to reach steady state. Medium‑barrier films (e.g., nylon, PET) typically complete in 4-6 hours, while low‑barrier films (LDPE, EVA) finish in 1-2 hours.

Q5: Do I need a constant‑temperature/humidity room for this instrument?

A: No. The BSG‑66‑G has built‑in semiconductor temperature control (±0.1°C). As long as the lab ambient temperature stays within a reasonable range (10-35°C), the instrument maintains test chamber temperature independently. This saves significant capital expense on environmental chambers.

Q6: Can this instrument test finished packages like bottles or blister packs?

A: The standard BSG‑66‑G tests flat films and sheets. For finished containers, we offer optional container test fixtures that adapt the differential‑pressure method to bottles, blister packs, and trays. Please contact our technical team for details.

Q7: What calibration is required?

A: The instrument uses a 2‑point calibration: a stainless steel impermeable shim (for baseline subtraction) and a NIST‑traceable certified reference film (for sensitivity verification). Calibration is recommended annually or per your laboratory's quality system requirements.

Keywords:

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Oxygen Permeation Analyzer - Coulometric Method