Oxygen Transmission Rate Tester (3-Cell)
The ToronOTR™ 3 is a high-performance 3-cell oxygen transmission rate tester designed for precision barrier evaluation. Engineered for food and pharmaceutical packaging R&D, it delivers simultaneous multi-specimen testing across 5°C to 95°C without compromising on measurement sensitivity or global standard compliance.
- 3 Independent Test Chambers
- 0.001 cm³/m²·d Resolution
- 5°C To 95°C Temperature
- 35% To 90% RH Humidity
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Oxygen Transmission Rate Tester (3-Cell) – ToronOTR™ 3
Three-Chamber Coulometric Oxygen Transmission Rate Tester for Film and Package Testing
The ToronOTR™ 3 is a 3-cell oxygen transmission rate tester designed to measure the oxygen transmission rate (OTR) of flexible films, sheets, and finished packages. It uses the coulometric sensor method with an equal-pressure test configuration to measure oxygen permeation directly without gas-specific calibration. Three independent test chambers allow three specimens to be tested simultaneously, increasing testing capacity for quality control and R&D laboratories. The instrument supports recognized methods including ASTM D3985 and ISO 15105-2, making it suitable for packaging, food, pharmaceutical, and materials testing applications.
The ToronOTR™ 3 can evaluate both flat film specimens and complete packages, allowing laboratories to assess oxygen barrier performance from material development through finished-package quality control. A water-bath temperature control system maintains the three test chambers at the selected temperature from 5°C to 95°C. Controlled relative humidity enables testing under defined environmental conditions, which is important for oxygen barrier materials whose permeation characteristics can vary with moisture. High-purity nitrogen transports permeated oxygen to the coulometric sensor, while digital carrier-gas flow control helps maintain stable test conditions.
With automated one-button operation, the ToronOTR™ 3 simplifies routine OTR testing and reduces manual intervention. Real-time data curves display oxygen flux, temperature, and humidity during the test, giving operators direct visibility into test progress. Traceable reference-film calibration supports reliable measurement verification and documentation, while integrated overload protection helps safeguard the pressure, oxygen, and temperature control systems.
The ToronOTR™ 3 3-Cell Oxygen Transmission Rate Tester is suited to laboratories that need simultaneous oxygen barrier testing of multiple samples across food packaging, pharmaceutical packaging, flexible packaging, polymer materials, quality control, and research and development applications.
Oxygen Transmission Rate Tester (3-Cell) – ToronOTR™ 3 Applications
The ToronOTR™ 3 supports multi-sample oxygen barrier testing for packaging, polymers, and other materials where oxygen permeation can affect product quality, shelf life, or stability. Its three-cell configuration allows laboratories to evaluate multiple specimens in a single test cycle.
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Snack and Dry Food Packaging: Evaluates the oxygen barrier performance of films, laminates, and finished packages designed to maintain freshness and reduce oxidation-related quality loss.
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Pharmaceutical and Medical Packaging: Measures oxygen transmission through blister films, foils, pouches, and other packaging structures used for oxygen-sensitive products.
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Flexible Packaging and Converting: Compares laminates, metallized films, coatings, and multilayer structures during material development and quality control.
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High-Barrier Film R&D: Evaluates materials such as EVOH, PVDC, SiOx-coated films, and nylon structures where oxygen barrier performance can vary with relative humidity.
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Oxygen Scavenger and Active Packaging: Assesses oxygen-scavenging films and active packaging systems to verify their barrier performance under controlled test conditions.
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Finished Package Testing: Measures oxygen transmission through complete packages, including pouches, bottles, trays, and closures when suitable package fixtures are available.
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Beverage and Bottle Packaging: Evaluates oxygen ingress through bottles, closures, liners, and related packaging components that can influence beverage quality and shelf life.
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Electronics and Photovoltaic Encapsulation: Tests barrier films and encapsulation materials designed to protect oxygen-sensitive electronic and photovoltaic components.
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Academic and Materials Research: Determines oxygen transmission, permeability, and permeance characteristics of polymer films and barrier materials for research and development.
Oxygen Transmission Rate Tester Standards
The ToronOTR™ 3 is designed around internationally recognized methods for measuring oxygen transmission through films, sheeting, packages, and barrier materials using coulometric and equal-pressure testing principles.
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ASTM D3985: Standard Test Method for Oxygen Gas Transmission Rate Through Plastic Film and Sheeting Using a Coulometric Sensor.
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ASTM F1307: Standard Test Method for Oxygen Transmission Rate Through Dry Packages Using a Coulometric Sensor.
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ASTM F1927: Standard Test Method for Determination of Oxygen Gas Transmission Rate, Permeability and Permeance at Controlled Relative Humidity Through Barrier Materials Using a Coulometric Detector.
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ASTM F2622: Standard Test Method for Oxygen Gas Transmission Rate Through Plastic Film and Sheeting Using Various Sensors.
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ISO 15105-2: Plastics — Film and Sheeting — Determination of Gas-Transmission Rate — Part 2: Equal-Pressure Method.
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JIS K 7126-2: Plastics — Film and Sheeting — Determination of Gas-Transmission Rate — Part 2: Equal-Pressure Method.
Oxygen Transmission Rate Tester (3-Cell) – ToronOTR™ 3 Key Features
The ToronOTR™ 3 combines coulometric oxygen measurement, three independent test cells, temperature control, and automated data acquisition for efficient oxygen transmission rate testing of films, sheeting, and packages.
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Coulometric Sensor Measurement: Uses an electrochemical sensor to measure oxygen flux directly, providing absolute OTR results without gas-specific calibration.
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Three Independent Test Chambers: Tests three specimens simultaneously with independent measurements and temperature sensing, increasing laboratory testing capacity.
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Film and Package Testing: Supports testing of flat films and finished packages, with optional fixtures for applications involving pouches, bottles, trays, and other package formats.
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Water-Bath Temperature Control: Maintains all three test chambers at a selected temperature from 5°C to 95°C for controlled and consistent testing conditions.
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Controlled Relative Humidity Testing: Conditions gas streams to a specified relative humidity, supporting oxygen barrier evaluation under moisture-controlled environments.
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Digital Carrier-Gas Flow Control: Provides adjustable and stable nitrogen carrier-gas flow for consistent measurement conditions across all test cells.
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24-Bit Delta-Sigma Data Acquisition: High-resolution signal conversion supports measurement of low oxygen transmission signals associated with high-barrier materials.
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One-Button Automated Testing: Initiates the complete test sequence with a single command, reducing manual operation and improving test-to-test consistency.
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Overload Protection: Integrated pressure, oxygen, and temperature protection circuits help safeguard the instrument during continuous and unattended testing.
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Independent Chamber Temperature Sensing: Each test chamber includes dedicated temperature sensing for accurate monitoring and control of individual test conditions.
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Built-In Ambient Monitoring: An internal temperature and humidity sensor records laboratory ambient conditions alongside test data for improved traceability.
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Multiple Test Modes: Selectable testing modes accommodate different material types, oxygen barrier levels, and laboratory testing requirements.
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Real-Time Data Curves: Displays oxygen flux, temperature, and humidity curves during testing, allowing operators to monitor measurement progress and test stability.
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Traceable Reference-Film Calibration: Supports calibration using certified reference films to improve measurement verification and maintain documented results for quality control and audit requirements.
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Laboratory Data Management Integration: Supports connection with laboratory data management software for centralized test records, data review, and reporting.
Theory and Method
The coulometric sensor method used by the ToronOTR™ 3 is an equal-pressure (isostatic) technique for measuring oxygen transmission rate (OTR) by monitoring oxygen that permeates through a specimen into an oxygen-free carrier stream. In each test cell, the specimen separates the chamber into upstream and downstream sides maintained at the same total pressure. High-purity oxygen flows across the upstream surface, while dry nitrogen sweeps the downstream surface. With equal total pressure on both sides, the oxygen partial-pressure difference provides the driving force for permeation.
Oxygen first dissolves into the film, then diffuses through the polymer structure before desorbing into the nitrogen carrier stream. The carrier gas transports the permeated oxygen to the coulometric sensor, an electrochemical detection cell in which oxygen undergoes a reduction reaction that generates a measurable electrical current. Because the generated charge has a defined relationship with the amount of oxygen reaching the sensor, the measurement is based on Faraday's law and provides a direct determination of oxygen flux rather than a relative measurement requiring gas-specific calibration.
The system determines the OTR for each specimen using the steady-state sensor current, carrier-gas flow rate, and exposed test area. For finished-package testing, the measurement can instead be based on the complete package being evaluated. Water-bath temperature control maintains all three test chambers at a consistent temperature, while controlled relative humidity conditions the gas streams to reproduce specified moisture conditions. This is particularly relevant for polymers such as EVOH and nylon, whose oxygen barrier performance can vary with humidity.
The three test cells operate in parallel and provide independent measurements for each specimen. This configuration allows three OTR values to be generated from a single test setup, supporting higher sample throughput for packaging development, quality control, and materials research.
Oxygen Transmission Rate Tester (3-Cell) - ToronOTR™ 3 Technical Specifications
| Parameter | Specification |
|---|---|
| Film Test Range (Standard) | 0.01 to 6,500 cm³/m²·d |
| Film Test Range (Optional) | 0.07 to 65,000 cm³/m²·d |
| Film Resolution | 0.001 cm³/m²·d |
| Package Test Range | 0.0001 to 62 cm³/pkg·d |
| Package Resolution | 0.00001 cm³/pkg·d |
| Specimen Amount | 3, independent |
| Temperature Range | 5°C to 95°C |
| Temperature Accuracy | ±0.1°C |
| Humidity Range | 0% RH; 35% to 90% RH; 100% RH |
| Humidity Accuracy | ±1% RH |
| Test Area | 50 cm² |
| Specimen Size (Film) | ≥ 150 mm × 94 mm; thickness < 1 mm |
| Specimen Size (Package) | Max Ø120 mm × 400 mm |
| Carrier Gas | 99.999% Nitrogen |
| Carrier Flow | 0 to 200 ml/min |
| Gas Interface | 1/8 inch |
| Voltage | AC 220 V, 50 Hz (110V is also available) |
| Dimensions | 730 mm (L) × 590 mm (W) × 350 mm (H) |
| Net Weight | 57 kg |
Standard Delivery
| Item | Description |
|---|---|
| Main Unit | Three-chamber coulometric OTR test instrument |
| Computer | Dedicated control PC |
| Control Software | Instrument operation and data-analysis software |
| Temperature Controller | Water-bath temperature control unit |
| Tank Regulator | Regulates carrier and test gas supply pressure |
| PCIe Acquisition Card | Data acquisition interface for the control PC |
| Communication Cable | Connects the instrument to the control PC |
| Sample Cutter | Prepares specimens to the required test size |
| Vacuum Grease | Seals the specimen at the chamber interface |
Optional Accessories
| Item | Description |
|---|---|
| Package Fixtures | Adapters for testing finished packages such as pouches and bottles |
| Reference Film | Certified film for traceable calibration |
| Vacuum Grease | Additional sealing grease for specimen mounting |
| Sample Cutter | Additional specimen-preparation cutter |
| Laboratory Data Management System | Centralized data management and reporting software |
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