Mass tester W303 2.0

water vapor transmission rateWVTRmoisture

Product Profile
Developed based on the Gravimetric Method (loss of weight) and compliant with GB/T 1037, ASTM E96 and other international standards, the W303 2.0 is designed to measure water vapor transmission rate (WVTR) of films, sheets, paper, packages and related materials used in food, pharmaceutical, medical device, daily chemical, photovoltaic and electronic industries. It provides wide-range WVTR detection for high, medium and low barrier materials with high throughput and repeatability.

Test Principle
Distilled water is placed into a clean test cup which is then sealed with a pre-conditioned sample and positioned in the test chamber. By controlling temperature and humidity, the distilled water evaporates and permeates through the sample. WVTR and related parameters are calculated from the weight loss of the test cup over time.

Compliance Standards

• Chinese Pharmacopoeia 2025
• GB/T 1037
• ASTM E96
• ISO 2528
• YBB 00092003

Technical Parameters

• Model: W303 2.0
• Test Range: 0.1 ~ 10000 g/(m²·24h)
• Resolution: 0.0001 g/(m²·24h)
• Temperature Range: 15 ~ 55 °C (±0.1 °C)
• Humidity: 90% RH (±2% RH)
• Test Area: 50.24 cm², Φ90 mm
• Test Stations: 3 independent stations
• Dimensions: 1150 × 545 × 315 mm
• Weight & Power: 66 kg; 1300 W; AC 220 V 50 Hz
• Standards: Chinese Pharmacopoeia 2025; GB/T 1037; ASTM E96; ISO 2528; YBB 00092003

Product Features

• Patented high-precision sensor: High-resolution weighing sensor with resolution up to 0.0001 g/(m²·24h).
• 3 independent test chambers: Wide measurement range and high throughput suitable for various barrier materials.
• Real-time 4-group curves: Displays WVTR-time, temperature-time, humidity-time and weight-time curves simultaneously.
• GMP & intelligent system: Audit trail, multi-level user rights, electronic signature, compliant with GMP requirements.
• National certified calibration: Calibrated with national standard substances (GBW(E)130543/544) to ensure measurement accuracy.
• IoT & remote control: Supports IoT platform, remote diagnosis, data management and resource download.

Applications

• Plastic films: PET, PE, BOPP, composite films, biodegradable films, etc.
• Sheets: Pharmaceutical hard sheets, metal composite sheets, rubber sheets, etc.
• Paper & paperboard: Coated paper, aluminum paper, paper-plastic composites, etc.
• Medical patches: Medical plasters, transdermal patches, wound dressings, etc.
• Packages: Bottles, bags, tubes, trays, plastic containers and other packaging forms.

Technical Specifications

• Model: W303 2.0
• Test Range: 0.1 ~ 10000 g/(m²·24h)
• Resolution: 0.0001 g/(m²·24h)
• Temperature Control Range: 15 ~ 55 °C (±0.1 °C)
• Humidity Control: 90% RH (±2% RH)
• Permeation/Test Area: 50.24 cm², Φ90 mm
• Test Stations: 3 independent stations
• Dimensions: 1150 × 545 × 315 mm
• Weight & Power: 66 kg; 1300 W; AC 220 V 50 Hz
• Standards: Chinese Pharmacopoeia 2025; GB/T 1037; ASTM E96; ISO 2528; YBB 00092003