Product Brief
• The Infrared Water Vapor Transmission Rate (WVTR) Tester Model W401L is a high-end precision packaging material testing instrument newly developed and upgraded by Guangzhou Biaoji's R&D team. It is engineered in strict compliance with ASTM and GB standard requirements as well as market demands, specifically designed to measure the water vapor transmission rate (WVTR) of samples under controlled temperature and humidity conditions. This instrument is widely applicable for testing the water vapor barrier performance of films, sheets, papers, packaging articles, and various materials across key industries such as food packaging, pharmaceutical packaging, medical device manufacturing, daily chemical production, and photovoltaic (PV) electronics. It plays a critical role in ensuring product shelf life, preserving product stability, and meeting industry-specific quality compliance standards for moisture-sensitive goods.
• The instrument complies with a comprehensive set of international and national standards, ensuring cross-industry compatibility and regulatory alignment for reliable testing results. These standards include:
GB/T 26253: China National Standard - "Plastics - Determination of water vapor transmission rate - Infrared detection method" (specifies the infrared-based testing protocol for measuring water vapor transmission rate of plastic materials, a core reference for domestic packaging and material industries).
YBB 00092003: China Pharmaceutical Packaging Standard - "Test Method for Water Vapor Transmission Rate of Pharmaceutical Packaging Materials" (a mandatory standard for moisture barrier performance testing of packaging used in pharmaceutical products, ensuring drug stability and shelf life).
ASTM F 1249: American Society for Testing and Materials Standard - "Standard Test Method for Water Vapor Transmission Rate Through Plastic Film and Sheeting Using a Modulated Infrared Sensor" (a widely recognized standard in North America for infrared-based WVTR testing of plastic films and sheets, applicable to various packaging applications).
BS EN ISO 15106-2: British/European Standard - "Plastics films and sheeting - Determination of water vapour transmission rate - Part 2: Infrared detection method" (adopted across Europe, specifying the infrared method for measuring water vapor transmission rate of plastic films and sheeting, ensuring consistency with EU industry requirements).
JIS K7129: Japanese Industrial Standard - "Plastics - Determination of water vapor transmission rate" (the primary standard in Japan for testing the water vapor transmission performance of plastic materials, covering both traditional and modern detection methods for diverse industrial needs).
Test Principle
• The W401L Water Vapor Transmission Rate Tester operates on the infrared detection principle-a cutting-edge methodology for rapid and accurate WVTR analysis. A pre-conditioned test specimen is fixed in the middle of the test chamber, which is thereby divided into a high-humidity chamber and a low-humidity chamber. Compressed air circulates through the high-humidity chamber to maintain a consistent high-moisture environment, while dry nitrogen (acting as the carrier gas) flows through the low-humidity chamber at a fixed velocity. Driven by the humidity gradient between the two chambers, water vapor permeates through the test specimen from the high-humidity side to the low-humidity side. The water vapor that passes through the specimen is carried by the flowing dry nitrogen to a high-precision infrared sensor. By analyzing the electrical signals output by the infrared sensor, key parameters such as the specimen's water vapor transmission rate (WVTR) are calculated with high accuracy.
Schematic Diagram of Infrared Method
(Note: The schematic diagram shall be attached separately based on the actual technical drawing. It visually illustrates core components of the infrared testing process, including the dual-chamber structure (high-humidity/low-humidity), carrier gas flow path, infrared sensor position, and specimen mounting, to facilitate clear comprehension for operators and quality control (QC) personnel.)
Executive Standards
• The instrument complies with a comprehensive set of international and national standards, ensuring cross-industry compatibility and regulatory alignment for reliable testing results. These standards include: GB/T 26253 (China's national standard for WVTR testing of plastic films via infrared method), YBB 00092003 (China's pharmaceutical packaging standard for moisture resistance), ASTM F 1249 (U.S. standard for WVTR of plastic films using infrared detection), BS EN ISO 15106-2 (European standard for WVTR of plastic films and sheets), and JIS K7129 (Japan's standard for determination of WVTR of plastic films and sheets).
Working principle diagram
Technical Parameters
| Technical Parameter Item | Specifications |
|---|---|
| Water Vapor Transmission Rate (WVTR) Range | 0.01～200 g/(m²·24h) (covers WVTR requirements for high, medium, and low barrier materials in packaging) |
| Measurement Resolution | 0.0001 g/(m²·24h) (enables ultra-sensitive detection of minimal moisture transmission, critical for pharmaceutical films) |
| Temperature Control Range | 15～45℃ (supports standard and customized environmental testing conditions for diverse materials) |
| Temperature Control Precision | ±0.2℃ (maintains stable thermal environment to eliminate data distortion from temperature fluctuations) |
| Humidity Control Range | (5～90)%RH, 100%RH (simulates dry to saturated humidity scenarios in storage/transport) |
| Humidity Control Precision | ±2%RH (ensures precise humidity regulation- a vital factor for accurate WVTR measurement) |
| Effective Transmission Area | 50.24 cm² (standardized testing area for consistent data comparison across samples) |
| Test Specimen Size | Φ100 mm (accommodates most industrial film, sheet, and packaging specimens without excessive trimming) |
| Maximum Specimen Thickness | ≤3 mm (suitable for thin flexible films to thick rigid sheets used in packaging) |
| Number of Specimens per Test | 1 piece (optimized for small-batch testing, R&D prototype analysis, or focused single-specimen evaluation) |
| Carrier Gas Requirement | 99.999% pure nitrogen (to be prepared by the user; high purity ensures no interference with infrared detection) |
| Carrier Gas Pressure | ≥0.1 MPa (guarantees stable flow rate for consistent vapor carrying efficiency) |
| Carrier Gas Flow Rate | 5~100 mL/min (adjustable to match different material permeability characteristics) |
| Overall Dimensions | 440mm × 680mm × 380mm (compact, space-saving design ideal for benchtop installation in labs) |
| Net Weight | 35kg (robust construction for long-term operational stability while remaining easy to relocate) |
| Power Consumption | 450 W (energy-efficient operation for continuous testing without excessive power load) |
| Power Supply | AC 220 V, 50 Hz (compatible with standard laboratory power grids globally) |
Product Features
• High-precision patented infrared moisture sensor
Equipped with a self-developed high-precision infrared moisture analysis sensor by GBPI, this instrument delivers exceptional performance-boasting ultra-high stability, an extremely low failure rate, and an extended service life. Its high sensitivity enables a measurement resolution of 0.0001 g/(m²·24h), ensuring accurate detection even for ultra-low barrier materials (e.g., pharmaceutical blister packaging films).
• Accurate and reliable test data
The instrument features precise control of testing temperature and humidity. Equipped with high-precision temperature and humidity sensors, the test chamber maintains stable environmental conditions-achieving a temperature control precision of ±0.2℃ and a humidity control precision of ±2%RH. It adopts an automated testing mode that enables real-time monitoring of temperature, humidity, flow rate values, and corresponding curves throughout the test process, ensuring excellent test repeatability and data consistency.
• Ultra-wide testing range and strong application adaptability
Featuring a single test chamber, the instrument has a compact and flexible design that optimizes laboratory space utilization-perfect for small-scale QC labs or R&D facilities. With an ultra-wide WVTR testing range of 0.01～200 g/(m²·24h), it meets the testing needs of various high, medium, and low barrier materials. Additionally, it can be equipped with customized adapter accessories to test the water vapor transmission rate of non-planar packaging containers such as bottles, pouches, and bowls-expanding its applicability to diverse packaging formats.
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