Labthink C230H Oxygen Transmission Rate (OTR) Tester for Films and Packaging

Overview

The Labthink C230H Oxygen Transmission Rate (OTR) Tester is an isobaric, coulometric-sensor-based instrumentation platform engineered for precise, reproducible quantification of oxygen permeation through polymeric films, laminates, coated substrates, rigid sheets, and sealed flexible packages. It operates on the fundamental principle of differential gas partial pressure: oxygen diffuses across a conditioned test specimen under controlled temperature and humidity, is carried by a high-purity nitrogen carrier stream to a coulometric oxygen sensor, and is electrochemically quantified in real time. This measurement methodology—fully aligned with ASTM D3985 (for planar materials) and ASTM F1307 (for packages)—ensures traceable, metrologically sound data essential for barrier performance validation in regulated environments.

Key Features

• Tri-chamber integrated test block: A patented, thermally and fluidically optimized three-cavity manifold minimizes inter-chamber variance in temperature, humidity, and laminar flow profile—enabling simultaneous, statistically valid parallel testing of identical or dissimilar specimens per ISO 5725 and ASTM E177 guidelines.
• Independent environmental control: Each test chamber incorporates dedicated PT100 temperature sensors and capacitive RH sensors, enabling closed-loop regulation at ±0.2 °C and ±1% RH (5–90% RH range), critical for evaluating moisture-dependent barrier behavior (e.g., EVOH, PVDC, or PVOH-coated structures).
• Automated operational workflow: Integrated Windows 10 OS on a 12-inch industrial touchscreen enables one-touch initiation of standardized test protocols—including preconditioning, equilibration, and dynamic OTR acquisition—with no manual parameter tuning required for routine QC applications.
• DataShield™ architecture: A purpose-built data governance layer providing AES-256 encryption, immutable audit trails, role-based access control, electronic signatures, and export to CSV, PDF, XML, and SQL-compatible formats—designed to satisfy ALCOA+ principles and facilitate 21 CFR Part 11 compliance when configured with validated software and hardware components.
• Flexible sample adaptability: Supports both flat specimens (max. 108 mm × 108 mm, ≤3 mm thick) and packaged units up to 3 L volume via optional package test fixture—allowing direct evaluation of seal integrity, corner effects, and real-world packaging configurations without destructive sampling.

Sample Compatibility & Compliance

The C230H accommodates a broad spectrum of barrier-sensitive materials used across pharmaceutical primary packaging (blister foils, cold-forming aluminum laminates), sterile medical device pouches (Tyvek®/PET/PE composites), food-grade flexible packaging (BOPP/metallized PET/LLDPE), photovoltaic backsheet films, and specialty electronics encapsulation layers. Its design conforms to Good Manufacturing Practice (GMP) expectations for analytical instrument qualification (IQ/OQ/PQ), supports GLP-compliant study execution, and meets the technical requirements for method validation per ICH Q2(R2). All firmware and software modules undergo periodic revision control and version-locking to ensure consistent data provenance across laboratory deployments.

Software & Data Management

Control and analysis are executed via Labthink’s proprietary OTRMaster™ software suite—built on a .NET Framework foundation with deterministic real-time data acquisition threads. The interface provides dual operating modes: Standard Mode, which executes pre-validated SOPs with locked parameters, and Research Mode, granting granular access to sensor gain, flow rate modulation, temperature ramp profiles, and custom calculation algorithms. DataShield™ ensures full traceability: every test record includes operator ID, timestamp, environmental logs, raw sensor voltage traces, calibration history, and digital signature metadata. Integration with LIMS or MES systems is supported via OPC UA or RESTful API endpoints—enabling automated data ingestion into enterprise quality management platforms.

Applications

• Quantitative verification of OTR specifications for pharmaceutical blister packaging per USP and YBB 00082003-2015
• Accelerated aging correlation studies linking OTR drift to shelf-life prediction models
• Comparative evaluation of coating uniformity and defect density in vacuum-deposited AlOx or SiOx barrier layers
• Validation of seal strength impact on package-level OTR in thermoformed trays and peelable lidding foils
• Regulatory submission support for FDA 510(k), PMDA, or EMA dossier dossiers requiring analytical instrument qualification evidence

FAQ

What standards does the C230H comply with?
The system is fully compliant with ASTM D3985 (film testing), ASTM F1307 (package testing), ASTM F1927 (high-barrier film testing), GB/T 19789 and GB/T 31354 (Chinese national standards), DIN 53380, JIS K7126-2-B, and YBB 00082003-2015.
Is the coulometric oxygen sensor user-replaceable?
Yes—the sensor module is field-serviceable with factory calibration certificate traceable to NIST SRM 2691b; typical service life exceeds 24 months under normal usage conditions.
Can the C230H be integrated into a 21 CFR Part 11 environment?
When equipped with the optional CFR 21 Part 11 software package, validated GMP computer system, and documented IQ/OQ/PQ protocols, the C230H satisfies electronic record and signature requirements for regulated laboratories.
What carrier gas specifications are required?
High-purity nitrogen (≥99.999%) at inlet pressure ≥0.28 MPa (40.6 psi) is mandatory; users must supply gas cylinders with appropriate regulators and particulate/moisture filtration.
Does the system support unattended overnight testing?
Yes—equipped with thermal runaway protection, gas leak detection logic, and automatic shutdown upon environmental deviation exceeding preset thresholds, enabling secure extended-duration barrier stability assessments.