MOCON Ox-TRAN® 2/48 Series Whole-Packaging Oxygen Transmission Rate (OTR) Analyzer

Overview

The MOCON Ox-TRAN® 2/48 Series is a high-throughput, coulometric oxygen transmission rate (OTR) analyzer engineered specifically for the quantitative measurement of oxygen permeation through intact, three-dimensional packaged products under controlled environmental conditions. Unlike conventional film-only OTR instruments that require specimen cutting and sealing, the Ox-TRAN® 2/48 enables direct, non-destructive evaluation of finished packages—including bottles, trays, pouches, cups, blister packs, laundry pods, caps, and cartons—without modification or epoxy-based sealing in most configurations. Its measurement principle is grounded in the electrochemical detection of oxygen molecules via MOCON’s proprietary Coulox® coulometric sensor, which quantifies oxygen flux in real time by measuring the electric current generated during the reduction of O₂ at a cathode in an electrolyte cell. This absolute measurement technique eliminates reliance on calibration standards, ensuring long-term stability and traceability to fundamental physical constants. The system operates in accordance with ASTM D3985 (“Standard Test Method for Oxygen Gas Transmission Rate Through Plastic Film and Sheeting Using a Coulometric Sensor”), while its whole-package configuration extends methodological rigor into applied packaging integrity assessment for pharmaceutical, food, medical device, and consumer goods industries.

Key Features

• Eight-chamber architecture with true parallel operation: four chambers dedicated to conditioned stabilization (temperature and RH-controlled), and four simultaneously active test chambers—enabling continuous throughput without sequential bottlenecks.
• Coulox® coulometric sensor technology: delivers absolute OTR values (cm³/m²·day·atm) without periodic recalibration; rated for >4 years of continuous operation with full manufacturer warranty.
• TruSeal® integrated sealing system: eliminates manual zeroing, minimizes background drift, and ensures repeatable headspace isolation—critical for low-permeability packages where baseline integrity directly impacts detection limit and precision.
• Automated gas flow and relative humidity control: independent regulation of carrier gas (N₂ or synthetic air) flow rates and RH levels (10–90% RH, ±1% RH accuracy) in both conditioning and test zones, supporting ISO 15105-2 and ASTM F1307 harmonized protocols.
• One-touch pneumatic chamber actuation: reduces mechanical handling error and operator variability during sample loading/unloading; compatible with disposable foil mounting plates for rapid package adaptation.
• Intuitive 10.4″ color touchscreen interface: supports multi-tier user authentication, electronic signatures, and 21 CFR Part 11–compliant audit trails—including timestamped event logs, method versioning, and change history for all critical parameters.

Sample Compatibility & Compliance

The Ox-TRAN® 2/48 accommodates a broad spectrum of 3D package geometries through a modular, interchangeable test chamber ecosystem. Standard fixtures include tray-and-lid, bottle-neck, flexible pouch, cup-and-film, and cap-seal configurations—all designed to maintain hermetic integrity without adhesive agents in >85% of use cases. Custom chamber engineering is available for atypical formats (e.g., syringes, inhalers, or multi-compartment containers). All chambers are validated per ASTM D3985 Annex A2 for whole-package testing and support regulatory submissions requiring demonstration of method suitability, intermediate precision, and robustness. Instrument qualification documentation aligns with ICH Q2(R2), FDA Process Validation Guidance, and EU Annex 15 requirements. Background OTR is routinely verified below 0.01 cm³/m²·day·atm using inert reference packages, enabling reliable quantification down to 0.05 cm³/m²·day·atm for commercial barrier packaging.

Software & Data Management

Ox-TRAN® ControlSuite™ software provides automated method development, adaptive test sequencing, and real-time statistical process monitoring. It supports creation of “Auto-Test” protocols that dynamically adjust dwell times and purge cycles based on initial O₂ rise kinetics—reducing unnecessary wait states for ultra-low-permeability samples. Raw sensor output, environmental logs, and chamber status data are stored in encrypted SQLite databases with SHA-256 hashing. Export options include PDF reports (with embedded digital signatures), CSV datasets for LIMS integration, and XML files compliant with ASTM E1461 metadata schema. Audit trail functionality records all user actions, parameter changes, and instrument events with immutable timestamps—meeting GLP, GMP, and ISO/IEC 17025 documentation requirements.

Applications

• Pharmaceutical primary packaging validation: blister foil integrity, vial stopper permeability, and pre-filled syringe container closure assessment.
• Food shelf-life modeling: OTR-driven prediction of oxidative rancidity in nuts, coffee, dairy powders, and ready-to-eat meals.
• Medical device sterility maintenance: verification of Tyvek®-based pouches, peel-open trays, and breathable films used in Class II/III devices.
• Sustainable packaging R&D: comparative OTR benchmarking of bio-based polymers, multilayer recyclates, and metallized cellulose substrates.
• Supplier qualification and incoming QC: batch-release testing of contract-manufactured packaging per ISO 22000 and BRCGS Packaging Standards.

FAQ

Does the Ox-TRAN® 2/48 require daily calibration?

No. The Coulox® sensor provides absolute oxygen measurement based on Faraday’s law; no calibration gases or reference standards are needed.
Can it test packages containing liquid or powder?

Yes—chambers are designed to accommodate headspace-only measurement regardless of internal fill state, provided the seal interface remains dry and mechanically stable.
Is humidity control mandatory for all tests?

Humidity is programmable per test method; dry nitrogen purging is supported for low-RH applications, while saturated gas streams enable high-RH challenge conditions per ASTM F1249 extensions.
How is data integrity ensured during power interruption?

The system features non-volatile memory buffering and automatic resume-on-reboot; all active test states and sensor readings are preserved without loss.
What regulatory documentation is supplied with the instrument?

Factory acceptance test (FAT) report, IQ/OQ protocols, ASTM D3985 conformance statement, sensor warranty certificate, and 21 CFR Part 11 readiness validation guide.