W401L Infrared Water Vapor Transmission Rate Tester

High Precision WVTR Testing Instrument for Packaging & Barrier Materials

Product Introduction

W401L Infrared Water Vapor Transmission Rate Tester is an upgraded high-end precision testing instrument developed by GBPI R&D team in accordance with ASTM, GB and international standards. It measures water vapor transmission rate of samples under controlled temperature and humidity, widely used for films, sheets, paper, packages and materials in food, pharmaceutical, medical devices, daily chemical, photovoltaic and electronics industries.

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Test Principle

W401L adopts the infrared sensor testing principle. The pre-processed sample is fixed in the test chamber, dividing it into wet and dry sides. Compressed air flows in the wet chamber, and dry nitrogen (carrier gas) flows in the dry chamber at a fixed rate. Due to humidity gradient, water vapor permeates to the dry chamber and is carried to the infrared sensor. The WVTR value is calculated by the electrical signal output from the sensor.

Compliant Standards

Technical Specifications

Key Features

• Patented high-precision infrared moisture sensor with ultra-high stability and 0.0001 g/(m²·24h) resolution.
• Precise temperature & humidity control: ±0.2℃, ±2%RH, stable and reliable test data.
• Ultra-wide test range 0.01~200 g/(m²·24h) for high, medium and low barrier materials.
• Intelligent OS with audit trail, multi-level user rights, fully compliant with GMP.
• Calibrated with national standard substances (GBW(E)130543 / GBW(E)130544) for authoritative data.

Applications

Plastic Films

PET, PE, BOPP, CPP, composite films, degradable films, etc.

Sheets

Pharmaceutical rigid sheets, composite sheets, rubber sheets, etc.

Paper & Paperboard

Coated paper, aluminum paper, paper-plastic composite materials, etc.

Medical Patches

Medical plaster, transdermal patches, healthcare dressings, etc.

Packaging Components

Bottles, tubes, trays, bags, blister packages, etc.