Yuelian YTS-100-40EC Vertical Temperature and Humidity Controlled Chamber for Water Vapor Transmission Rate (WVTR) Testing of Tapes

Overview

The Yuelian YTS-100-40EC is a vertically oriented, precision-engineered environmental test chamber specifically configured for standardized water vapor transmission rate (WVTR) testing of pressure-sensitive adhesive tapes, packaging films, and barrier-coated substrates. It operates on the gravimetric cup method (ASTM E96, ISO 15106-1, GB/T 21529), where test specimens are sealed over desiccant-filled permeation cups and exposed to controlled temperature and humidity conditions. The chamber maintains highly stable thermal and hygrometric environments—critical for achieving reproducible WVTR results per ISO/IEC 17025-compliant laboratory practices. Its dual-stage cascade refrigeration system enables reliable operation down to −55 °C, overcoming thermodynamic limitations inherent in single-stage systems using R-404A, while its low-thermal-conductivity carbon-fiber humidification reservoir eliminates condensate drip—a common source of measurement error in tape testing due to unintended sample wetting.

Key Features

• Stable dual-zone control: Independent high-precision regulation of temperature (±0.1 °C resolution) and relative humidity (±0.1 %RH resolution) via 7-inch touchscreen controller with 12-program memory, 120-segment programmability, and automatic PID parameter self-tuning.
• Cascade refrigeration architecture: Two imported Tecumseh (France) hermetic compressors (375 W each) paired with R-404A refrigerant ensure rapid thermal response (−40 °C to +100 °C in ≤45 min, unloaded) and consistent sub-zero performance without reliance on auxiliary heating compensation.
• Drip-free humidification system: Carbon-fiber composite water reservoir with low thermal conductivity (<0.1 W/m·K) prevents surface condensation; integrated overflow drainage and pressure-relief channels direct excess moisture safely into the steam generator—eliminating risk of sample contamination.
• Uniform airflow design: 60 W axial motor driving extended-shaft multi-wing impeller with adjustable louvered air distribution ensures ±2.0 °C temperature and ±3.0 %RH humidity uniformity across the full test volume (400 × 500 × 500 mm).
• Robust construction: Interior chamber fabricated from mirror-finish SUS#304 stainless steel; exterior from powder-coated mild steel; structural base reinforced with ASTM A36 angle iron; insulation composed of rigid polyurethane foam (≥30 mm) + glass wool (≥20 mm) for thermal integrity.
• Comprehensive safety architecture: Includes dual compressor overheat/overcurrent protection, high-pressure cut-off, dry-burn prevention, fuseless overload breakers, and embedded non-reactive door latch with triple-layer vacuum-insulated viewing window.

Sample Compatibility & Compliance

The YTS-100-40EC accommodates standard ASTM E96 desiccant cups (diameter ≤100 mm) mounted on SUS#304 perforated grid shelves (2 included, load capacity ≤10 kg/shelf). Its internal geometry supports simultaneous testing of up to 12 tape specimens under identical climatic conditions. The chamber meets mechanical and environmental requirements for GLP-compliant testing per ISO/IEC 17025:2017 Annex A (clause A.5.8.2), and supports audit-ready documentation including calibration traceability (NIST-traceable RTD sensors), program execution logs, and fault history records. While not certified to IEC 61000-4 immunity standards, its electromagnetic compatibility is validated per EN 61326-1 for laboratory use. All electrical components—including Schneider contactors, Omron relays, and RAINBOW thermal protectors—comply with CE marking directives.

Software & Data Management

The integrated controller provides native USB and RS485 interfaces for bidirectional communication with Windows-based data acquisition software (supplied). Real-time monitoring includes graphical display of setpoint vs. actual temperature/humidity curves, cumulative runtime tracking, and segment-wise deviation alerts. Data export formats include CSV and PDF reports compliant with FDA 21 CFR Part 11 requirements—supporting electronic signatures, audit trails, and user-access-level permissions (admin/operator/guest). Firmware supports remote firmware updates and secure configuration backup/restore. No cloud dependency: all logging occurs locally on internal flash memory (≥16 GB), with optional external USB storage mirroring.

Applications

This chamber is routinely deployed in QC laboratories for ASTM D1898 (tape adhesion retention), ASTM F1249 (high-barrier film WVTR), and ISO 15106-3 (infrared detection method validation). It supports accelerated aging studies per ISTA 3A and packaging qualification per USP for medical device tapes. Academic users apply it to investigate moisture-induced degradation kinetics in acrylic PSAs, silicone release liners, and conductive adhesive films. Its −55 °C capability enables low-temperature WVTR characterization of cryogenic-grade tapes used in aerospace composites and superconducting magnet insulation systems.

FAQ

What standards does this chamber support for WVTR testing?

It fully supports ASTM E96 (desiccant and water methods), ISO 15106-1, GB/T 21529, and JIS Z 0208—provided with appropriate cup fixtures and desiccant handling protocols.

Can the chamber maintain stability at 10 %RH or below?

No—the specified humidity range is 20–98 %RH. Sub-20 %RH operation requires optional dehumidification add-ons (e.g., desiccant wheel module), not included in base configuration.

Is the controller compliant with 21 CFR Part 11 for pharmaceutical testing?

Yes—the supplied software implements electronic signatures, role-based access control, immutable audit trails, and data integrity safeguards meeting Part 11 Subpart B requirements.

What maintenance intervals are recommended for the refrigeration system?

Compressor oil and filter dryer (ALCO brand) require replacement every 24 months under continuous operation; annual calibration of PT100 sensors and verification of humidity sensor drift against NIST-traceable hygrometers is advised.

Does the chamber include validation documentation for IQ/OQ/PQ?

Factory-installed IQ/OQ documentation (including sensor calibration certificates, alarm function tests, and uniformity mapping reports) is provided; PQ must be performed on-site by the user per their SOPs and applicable regulatory guidelines.