Labthink C330H Electrolytic Sensor-Based Water Vapor Transmission Rate (WVTR) Tester for Bottles, Flexible Packaging, and Rigid Containers
| Brand | Labthink |
|---|---|
| Model | C330H |
| Origin | Shandong, China |
| Manufacturer | Labthink Co., Ltd. |
| Test Principle | Electrolytic (Coulometric) Sensor per ISO 15106-3 |
| Test Range | 0.005–50 g/(m²·day) |
| Resolution | 0.001 g/(m²·day) |
| Repeatability | ±0.005 g/(m²·day) or ±2%, whichever is greater |
| Temperature Control | 10–55 °C (±0.2 °C) |
| RH Control | 5–90% RH (±1% RH), optional 100% RH |
| Test Chambers | 3 independent |
| Sample Area | 50 cm² (standard) |
| Max. Package Volume | 3 L |
| Sample Size | 108 mm × 108 mm |
| Max. Thickness | ≤3 mm |
| Carrier Gas | ≥99.999% N₂, ≥0.28 MPa (40.6 psi) |
| Interface | 1/8″ stainless steel tubing |
| Optional Compliance | 21 CFR Part 11, GMP Data Integrity, DataShield™ Audit-Trail System |
Overview
The Labthink C330H is a high-precision, triple-chamber water vapor transmission rate (WVTR) tester engineered for quantitative permeation analysis of rigid packaging (e.g., PET carbonated beverage bottles), semi-rigid containers, flexible films, laminates, coated papers, and pharmaceutical blister packs. It operates on the electrolytic (coulometric) sensor principle defined in ISO 15106-3, where water vapor diffusing across a test specimen is carried by dry carrier nitrogen to a proprietary solid-polymer electrolyte sensor. The sensor quantifies transmitted moisture via Faraday’s law—converting water molecules into measurable electric charge with linear, stoichiometric response. This coulometric detection method delivers intrinsic calibration stability, minimal drift, and exceptional sensitivity down to 0.005 g/(m²·day), making the C330H suitable for evaluating both medium- and high-barrier materials used in food shelf-life extension, sterile medical device packaging, and moisture-sensitive electronics encapsulation.
Key Features
- Triple-Independent Test Chambers: Three thermally isolated, individually controlled chambers enable simultaneous testing of identical replicates (per ISO/ASTM parallel trial requirements) or three distinct specimens under identical or divergent environmental conditions—supporting comparative barrier studies and accelerated stability protocols.
- Patented Electrolytic Sensor Technology: Labthink-developed coulometric moisture sensor with >10-year operational lifespan, <0.5% signal drift/year, and immunity to CO₂, O₂, or organic vapors—ensuring long-term measurement fidelity without recalibration between routine QC runs.
- Spatial 3D Thermal Equilibration System: Active air-circulating manifold with distributed PID-controlled heaters and Peltier coolers maintains uniform temperature distribution (<±0.1 °C deviation across chamber volume) critical for minimizing edge effects and ensuring ASTM F3299-compliant boundary conditions.
- In-Chamber Environmental Monitoring: Each chamber integrates dual high-accuracy capacitive RH sensors and Pt1000 RTDs, continuously logging local humidity and temperature at both upstream (wet side) and downstream (dry side) locations—enabling real-time validation of gradient integrity per ISO 15106-3 Annex B.
- Automated Climate Control & Workflow Integration: Fully motorized RH generation (via saturator + mixing valve) and temperature ramping eliminate manual intervention; system self-verifies setpoint stability for ≥30 min prior to test initiation, satisfying GLP pre-test qualification criteria.
Sample Compatibility & Compliance
The C330H accommodates flat specimens up to 108 mm × 108 mm and ≤3 mm thick—including metallized PET, SiOₓ-coated films, AlOₓ barrier coatings, and paperboard laminates—as well as intact rigid packages up to 3 L volume (e.g., 2-L PET soda bottles, HDPE pharmaceutical jars). Sealing fixtures conform to YBB 00092003-2015 geometry tolerances and GB/T 21529 burst-pressure specifications. All hardware and firmware comply with electromagnetic compatibility (EMC) standards IEC 61326-1 and safety standard IEC 61010-1. Optional configurations include 21 CFR Part 11-compliant audit trail, electronic signatures, and role-based access control—validated for GMP-regulated environments per Annex 11 and ALCOA+ data integrity principles.
Software & Data Management
Controlled via an integrated 12-inch Windows 10 IoT Enterprise touchscreen interface, the C330H runs Labthink’s certified DataShield™ software suite. It supports three operational modes: (1) Quick Mode for routine QC with one-touch test launch and auto-pass/fail judgment against user-defined limits; (2) Advanced Mode offering granular control over ramp rates, dwell times, multi-step RH profiles, and custom calculation algorithms; and (3) Research Mode enabling raw sensor voltage logging at 10 Hz resolution for kinetic diffusion modeling. DataShield™ enforces AES-256 encryption, immutable audit trails with timestamped operator actions, and export to CSV, PDF, XML, and LIMS-compatible ASTM E1384 formats. Network options include Ethernet TCP/IP, Wi-Fi 5 (802.11ac), and optional Labthink Cloud Sync for centralized fleet monitoring.
Applications
- Quantifying WVTR of PET bottles under 90% RH / 38 °C to predict carbonation loss and flavor degradation in soft drink shelf-life studies.
- Evaluating moisture ingress through child-resistant blister packs per USP for hygroscopic APIs.
- Validating barrier performance of flexible retort pouches (e.g., Al/PET/PP) exposed to 100% RH steam sterilization cycles.
- Comparing accelerated aging outcomes (40 °C/75% RH) versus real-time storage for dried dairy powder packaging systems.
- Supporting DOE-driven formulation optimization of bio-based barrier coatings on kraft paper substrates.
FAQ
What standards does the C330H directly support?
ISO 15106-3, ASTM F3299, GB/T 21529, and YBB 00092003-2015—all implemented via hardware configuration and software test templates.
Can the instrument test non-flat packaging without modification?
Yes—the optional bottle fixture kit includes vacuum-sealed cradles and pressure-compensated neck seals compliant with ISO 15106-3 Annex D for upright container testing.
Is nitrogen purity critical for measurement accuracy?
Yes—carrier gas must be ≥99.999% N₂; impurities (especially H₂O, O₂, hydrocarbons) cause baseline drift and sensor poisoning. Labthink recommends inline purifiers and dew-point monitors.
How is sensor calibration traceability maintained?
The electrolytic sensor requires no routine calibration; its Faraday-based response is inherently absolute. Annual verification uses NIST-traceable permeation standards (e.g., NIST SRM 1477) per ISO/IEC 17025 accredited procedures.
Does the system support remote diagnostics and preventive maintenance alerts?
Yes—embedded SNMP agents report real-time status (sensor health, gas pressure, thermal stability) to enterprise network management systems; predictive alerts trigger at 85% sensor end-of-life estimate.
