Yuelian YTS-100-40EC Water Vapor Transmission Rate (WVTR) Tester for Pressure-Sensitive Adhesive Tapes
| Brand | Yuelian |
|---|---|
| Origin | Guangdong, China |
| Model | YTS-100-40EC |
| Instrument Type | Vertical Chamber |
| Temperature Range | −40 °C to +150 °C (min. −55 °C) |
| Humidity Range | 20–98 %RH |
| Temperature Uniformity | ±2.0 °C |
| Humidity Uniformity | ±3.0 %RH |
| Temperature Stability | ±1.0 °C |
| Humidity Stability | ±1.0 %RH |
| Heating Power | 1 kW |
| Cooling System | Dual-stage cascade refrigeration (2 × 375 W hermetic compressors, R-404A) |
| Internal Dimensions | 400 × 500 × 500 mm (W × H × D) |
| Controller | 7-inch color touchscreen with PID auto-tuning, 12 program groups / 120 segments, data logging & RS485 interface |
Overview
The Yuelian YTS-100-40EC Water Vapor Transmission Rate (WVTR) Tester is a precision-engineered environmental test chamber specifically designed for standardized measurement of water vapor permeability in pressure-sensitive adhesive (PSA) tapes and other thin polymeric barrier materials. It operates on the gravimetric cup method (ASTM F1249, ISO 15106-2, GB/T 21529–2008), where test specimens are sealed over desiccant-filled permeation cups and exposed to controlled temperature and humidity gradients. The mass gain of each cup is monitored over time to calculate WVTR in g·m⁻²·day⁻¹ — a critical parameter for evaluating packaging integrity, medical tape performance, and functional film reliability. Unlike generic climate chambers, the YTS-100-40EC integrates metrologically traceable stability (±1.0 °C / ±1.0 %RH), dual-stage cascade refrigeration for reliable sub-zero operation down to −55 °C, and specialized low-thermal-conductivity carbon-fiber humidification reservoirs to eliminate condensate drip — ensuring sample integrity and measurement repeatability across extended test durations.
Key Features
- Ultra-stable dual-climate control: Achieves ±1.0 °C temperature stability and ±1.0 %RH humidity stability under dynamic load conditions, validated per IEC 60068-3-5 and ISO 17025 calibration protocols.
- Cascade refrigeration architecture: Two independent French Tecumseh hermetic compressors (375 W each) with R-404A refrigerant enable rapid cooling from +20 °C to −40 °C in ≤45 min (unloaded), and sustained operation at −55 °C — essential for accelerated aging and low-temperature barrier characterization.
- Non-drip humidification system: Carbon-fiber water reservoir with low thermal conductivity (<0.15 W·m⁻¹·K⁻¹) prevents surface condensation; integrated overflow diverters route excess moisture to the steam generator, eliminating droplet formation that could compromise specimen adhesion or gravimetric accuracy.
- 7-inch industrial touchscreen controller: Supports up to 12 user-defined test programs (120 segments total), real-time graphical display of setpoint vs. actual curves, automatic PID parameter tuning, power-loss recovery with program continuity, and audit-trail-capable data logging compliant with GLP requirements.
- Structural integrity for long-term validation: Interior constructed from mirror-finish SUS#304 stainless steel; insulation comprises rigid polyurethane foam (≥30 mm) plus glass wool; door features triple-layer vacuum-insulated window and embedded non-reactive handle for minimal thermal leakage.
Sample Compatibility & Compliance
The YTS-100-40EC accommodates standard ASTM D3045-sized permeation cups (diameter 60 mm, depth 25 mm) and supports circular or rectangular PSA tape specimens up to 100 mm × 100 mm. Its internal volume (100 L) allows simultaneous testing of up to six specimens under identical environmental conditions. The chamber meets mechanical and electrical safety requirements per IEC 61000-4 (EMC), UL 61010-1, and GB 4793.1–2007. For regulatory submissions, its control system supports 21 CFR Part 11-compliant electronic signatures when paired with optional validation software — enabling full traceability of operator actions, parameter changes, and alarm events. All temperature/humidity sensors are NIST-traceable and field-calibratable using certified reference standards.
Software & Data Management
The embedded controller provides native CSV export via USB or RS485 interface, compatible with LIMS platforms and statistical process control (SPC) tools. Optional PC-based software (Yuelian TestSuite™) enables automated report generation per ASTM F1249 Annex A1, including uncertainty estimation per GUM (JCGM 100:2008), trend analysis of WVTR drift over time, and comparative overlay of multiple material datasets. Audit logs record timestamped entries for all critical events: setpoint modifications, door openings, alarm triggers (e.g., high-pressure cutout, dry-burn detection), and calibration interventions — satisfying FDA and EU Annex 11 documentation requirements for quality-controlled laboratories.
Applications
- Quality control of medical-grade acrylic and rubber-based PSA tapes used in transdermal drug delivery systems and wound dressings.
- Development and validation of barrier films for flexible electronics encapsulation, where WVTR < 10⁻⁴ g·m⁻²·day⁻¹ is required to prevent moisture-induced delamination.
- Accelerated shelf-life studies of pharmaceutical blister packaging under ICH Q1A(R3) climatic zones (e.g., 40 °C/75 %RH).
- Comparative evaluation of silicone release liners and backing substrates for peel adhesion consistency under variable humidity.
- Research into hydrophilic/hydrophobic polymer blends for smart packaging applications requiring tunable moisture permeability.
FAQ
What standards does this tester support for WVTR measurement?
ASTM F1249 (infrared detection), ASTM E96 (gravimetric cup method), ISO 15106-2, GB/T 21529–2008, and JIS Z 0208 — with full compliance achievable via proper cup selection and procedural adherence.
Can the chamber maintain −40 °C while holding 90 %RH simultaneously?
No — thermodynamic constraints prevent concurrent extreme low temperature and high humidity. The operational envelope is bounded by the saturation curve of water vapor; at −40 °C, maximum achievable RH is <1 % — consistent with physical limits defined in ASHRAE Fundamentals Chapter 1.
Is third-party IQ/OQ/PQ validation support available?
Yes — Yuelian provides documented validation protocols, blank test records, and on-site qualification assistance aligned with ISO/IEC 17025 and GMP Annex 15 requirements.
How is temperature uniformity verified during routine operation?
Using a 9-point sensor array (per ISO 17025 clause 5.10.4), with measurements taken at center and eight peripheral locations after 30 minutes of stabilization — deviation must remain within ±2.0 °C across the working volume.
What maintenance intervals are recommended for the refrigeration system?
Compressor oil and filter driers should be replaced every 24 months or 4,000 operating hours; condenser coils require biweekly vacuum cleaning; humidity sensors are calibrated annually against NIST-traceable hygrometers.
