MOCON OX-TRAN® 2/48 Oxygen Transmission Rate Analyzer

Overview

The MOCON OX-TRAN® 2/48 is a high-throughput, coulometric oxygen transmission rate (OTR) analyzer engineered for precise, standardized measurement of oxygen permeation through complete packaged goods and three-dimensional (3D) specimens under controlled environmental conditions. Unlike conventional film-only OTR systems, the OX-TRAN® 2/48 employs a dual-stage, parallel architecture—featuring four independent conditioning chambers and four simultaneous test chambers—to enable continuous, uninterrupted analysis of finished packages such as bottles, trays, pouches, cups, blister packs, detergent pods, and sealed cartons. Its core measurement principle relies on the electrochemical reduction of oxygen molecules at a patented Coulox® coulometric sensor, which quantifies oxygen flux in real time via Faraday’s law, delivering absolute OTR values (cm³/m²·day·atm) without periodic calibration drift or zero-point correction. Designed for regulatory-grade laboratories, the system operates fully compliant with ASTM D3985 (Standard Test Method for Oxygen Gas Transmission Rate Through Plastic Film and Sheeting Using a Coulometric Sensor), and supports method validation under ISO 15105-2 and FDA-relevant packaging stability protocols.

Key Features

• Parallel 8-chamber architecture: 4 chambers condition samples while 4 concurrently measure OTR—doubling effective throughput versus sequential systems.
• Coulox® coulometric sensor: Delivers trace-level oxygen detection (down to 0.005 cm³/m²·day·atm) with intrinsic linearity, no recalibration required, and guaranteed 4-year operational life under standard use.
• TruSeal® integrated sealing verification: Eliminates manual leak-checking; automatically confirms hermetic integrity prior to test initiation, reducing false positives and background interference.
• Automated environmental control: Independent, closed-loop regulation of relative humidity (10–90% RH, ±1% RH accuracy) and carrier gas flow (N₂ or synthetic air) in both conditioning and test zones.
• Tool-free, pneumatic test chamber loading: One-touch actuation secures sample fixtures with repeatable clamping force—critical for maintaining consistent seal geometry across heterogeneous package types.
• Permatran-W® software suite: Supports GLP-compliant audit trails, electronic signatures, user role-based access control, and automated report generation (PDF/CSV/XLSX) with full metadata embedding.

Sample Compatibility & Compliance

The OX-TRAN® 2/48 accommodates a broad spectrum of commercial packaging formats without requiring destructive modification or epoxy sealing in most cases. Standard interchangeable test cells include flat-bottom tray cells, cylindrical bottle adapters, flexible pouch clamps, cup-and-lid fixtures, and custom-engineered cells for irregular geometries (e.g., laundry pod containers, pharmaceutical blister lidding). All cells maintain ASTM D3985-defined diffusion area fidelity and thermal mass consistency. The system meets ISO/IEC 17025 documentation requirements for accredited testing labs and supports 21 CFR Part 11 compliance when configured with electronic signature modules and secure data archiving. Background OTR is minimized to <0.001 cm³/m²·day·atm via TruSeal®’s passive barrier design and inert-gas purging—ensuring measurement integrity for ultra-high-barrier materials (e.g., AlOx-coated PET, SiOx-laminates, and multilayer pharma foils).

Software & Data Management

Permatran-W® v6.x provides a validated, Windows-based interface with intuitive workflow navigation, real-time sensor diagnostics, and dynamic method builder functionality. Users define multi-step test protocols—including preconditioning ramp profiles, RH stabilization thresholds, and endpoint criteria—via drag-and-drop logic. All raw sensor output, environmental logs, and operator actions are timestamped and cryptographically hashed for forensic traceability. Data export adheres to LIMS interoperability standards (ASTM E1482, ANSI/NIST ITL 10-1), and optional cloud sync enables centralized instrument fleet monitoring. Audit trail records retain full history of parameter changes, user logins, calibration events (though none required for Coulox®), and report revisions—fully aligned with GMP documentation expectations for pharmaceutical primary packaging qualification.

Applications

• Pharmaceutical packaging: OTR validation of blister cards, HDPE bottles, and cold-chain shippers per USP and ICH Q5C stability guidelines.
• Flexible food packaging: Shelf-life modeling for retort pouches, coffee bags, and modified-atmosphere packaging (MAP) systems.
• Medical device sterilization packaging: Verification of Tyvek®-based pouches and peel-open trays against ISO 11607-1 barrier performance criteria.
• Electronics encapsulation: Quantification of oxygen ingress into moisture-sensitive OLED and semiconductor packaging.
• Material development: Comparative OTR screening of novel biopolymer blends, nanocomposite films, and vacuum-metallized substrates.

FAQ

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

No. The Coulox® sensor provides absolute oxygen quantification based on Faraday’s law; no zero/span calibration is necessary during routine operation.
Can it test packages containing headspace gas other than air?

Yes. The system supports custom purge gases (e.g., 100% N₂, 5% CO₂ in N₂) and measures net OTR regardless of internal headspace composition.
Is TruSeal® compatible with irregularly shaped or soft packages?

Yes. TruSeal®’s adaptive gasket design accommodates dimensional variability across >95% of commercial packaging geometries without tooling or adhesive.
What level of RH control accuracy is achieved during conditioning?

±1% RH at setpoints between 10% and 90%, verified by NIST-traceable hygrometers integrated into each conditioning chamber.
How does the system ensure data integrity for FDA submissions?

With optional 21 CFR Part 11 configuration, it delivers electronic signatures, immutable audit trails, and ALCOA+ compliant data storage—validated per IQ/OQ/PQ protocols.