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Key: test item, instrument name, total nonvolatile migration, gravimeter, moisture permeameter

Product

WVTR Permeability Analyzer-Cup Method

W-B-11 /31 /41 /61 /81 -G
Focusing on packaging and material testing technology, we are committed to quality control in industries such as healthcare, pharmaceuticals, food, packaging, textiles, and new materials. Our products are widely used in enterprises, testing institutions, universities, and research institutes.

Category:

Permeation Analyzer

Water Vapor Transmission Rate Analyzer

WVTR Tester- Gravimetric Method

Water Vapor Transmission Rate Tester

--- Gravimetric Method for Pharmaceutical and Flexible Packaging Applications

Overview

The LabStone W-B Series Water Vapor Transmission Rate Tester is an advanced gravimetric permeability testing system designed for evaluating water vapor barrier performance of pharmaceutical packaging, flexible packaging materials, medical products and high-performance barrier structures.

Unlike conventional cup method instruments, the W-B Series provides a wide humidity control range from 10% RH to 90% RH, allowing realistic simulation of storage, transportation and climatic conditions.

The instrument supports both water method and desiccant method testing while delivering highly stable and repeatable gravimetric measurements.

Designed for Real-World Humidity Conditions

Many packaging materials exhibit dramatically different moisture barrier performance under different humidity conditions.

For example:

Pharmaceutical Packaging

Drug stability can be significantly affected by moisture ingress under tropical storage conditions.

Flexible Packaging

Barrier films may perform well at low humidity but exhibit increased moisture transmission at elevated humidity levels.

Medical Packaging

Sterile barrier systems often require verification under high-humidity environments.

Food Packaging

Snack foods, nutritional powders and moisture-sensitive products require packaging evaluation under realistic storage conditions.

The W-B Series enables laboratories to simulate these practical conditions through precise humidity control up to 90% RH.

Function:

Water vapor permeability testing.

Water vapor transmission rate, permeability rate, permeability coefficient. Used for membranes, films, sheets, containers, and building materials made of materials such as plastic, fabric, leather, metal, etc.

Working Principle:

The instrument employs the Gravimetric Method in accordance with international water vapor permeability standards.

Water or desiccant is placed inside the test cup.

The specimen is sealed over the cup and exposed to a controlled environment.

A humidity difference between the two sides of the specimen creates a vapor pressure gradient.

Water vapor migrates through the material, causing the test cup mass to increase or decrease depending on the selected method.

A precision analytical balance continuously records weight changes and automatically calculates:

Water Vapor Transmission Rate (WVTR)
Water Vapor Permeability
Permeability Coefficient

The system supports:

Water Method
Desiccant Method
Upright Cup Method
Inverted Cup Method

Compliant Standards:

ASTM E96 / ASTM E96M
ISO 2528
ASTM D1653
DIN 53122
TAPPI T464
GB/T 1037
GB/T 17146
GB/T 12704.1
GB/T 12704.2
GB/T 21332
QB/T 2414
YY/T 0471
YBB 0009-2003-2015
General Chapter 4010, Chinese Pharmacopoeia Volume IV, Determination of Water Vapor Transmission Rate

Key Features:

Wide Humidity Simulation Range

Humidity range: 10% RH – 90% RH

Allows testing under realistic environmental conditions.

Particularly valuable for pharmaceutical and food packaging applications.

Water Method and Desiccant Method in One Instrument

Supports both major gravimetric test methods.

Benefits:

greater flexibility
broader standards compliance
expanded application range

Fog-Free Humidity Generation

Patented humidification system provides:

stable humidity
no water droplets
no condensation artifacts

resulting in more reliable measurements.

Automatic Water Replenishment

Maintains humidity stability during long-duration testing without operator intervention.

Balance Protection Technology

Patented thermal and moisture isolation design protects the analytical balance from environmental influence.

Multiple Sample Capacity Options

Available models:

Model	Sample Capacity
W-B-11-G	1
W-B-31-G	3
W-B-41-G	4
W-B-61-G	6
W-B-81-G	8

Users can select the configuration according to laboratory workload.

Specifications:

Parameter	Value			Parameter			Value
Measure Range	Film: 0.05-10,000 g/m2•24h, Package: 0.0002-30 g/pkg•24h			Measurement Error			Film: 0.05 g/ m²•24h, Package: 0.0002 g/pkg•24h
Balance Range	210 g			Balance Resolution			0. 1 mg
Temp Range	15-45℃			Temperature Error			±03 ℃
Humidity Range	10% - 90%			Humidity Error			±2% RH
Flow Rate	0.03 - 2.5 m/s			Air Pressure			>0.3 MPa (self-supplied)
Test Area	33 cm²(can be customized)			Sample Thickness			<3 mm
				Custom Cup Height			<150 mm
Power Supply	AC220V /110V ;50/60Hz			Power			＜2,000 W
Model	Model
	W-B-11-G	W-B-31-G	W-B-41-G		W-B-61-G	W-B-81-G
Sample Quantity	1	3	4		6	8
Mainframe Size	873(L)× 700(B)× 688(H) mm
Net Weight	75Kg	82kg	83 kg		90kg	95kg

Standard Configuration

Testing mainframe, computer, air dryer, professional testing software, sample cups, calibration weight, sampler.

Optional Configuration

GMP Computerized System software module, wax-sealed sample cups.

Self-supplied: Compressed air, distilled water, desiccant.

Application Industries

Pharmaceutical Packaging Industry

Ideal for testing:

blister packaging
pharmaceutical films
sachets
pouches
medical packaging laminates

Supports moisture barrier studies during product development and packaging validation.

Drug Packaging Material Manufacturers

Suitable for:

PVC films
PVDC films
Alu-Alu blister materials
composite pharmaceutical structures

Used for quality control and compliance verification.

Flexible Packaging Industry

Applicable to:

PET structures
PE films
multilayer packaging
barrier laminates
retort packaging

Food Packaging Industry

Used for:

coffee packaging
dairy packaging
snack packaging
powdered food packaging

Supports shelf-life prediction and packaging optimization.

Medical Device Packaging

Suitable for:

sterile barrier systems
medical pouches
healthcare packaging materials

Research Institutes and Testing Laboratories

Widely used for:

permeability studies
package validation
supplier qualification
regulatory testing

Frequently Asked Questions(FAQ)

What is the difference between the water method and desiccant method?

The water method uses water inside the cup, while the desiccant method uses a drying agent. Both create a humidity gradient that drives moisture transmission through the specimen.

Why is high-humidity testing important?

Many packaging materials exhibit different moisture barrier properties under high humidity conditions. Testing at elevated humidity improves prediction of real-world performance.

Is this instrument suitable for pharmaceutical packaging?

Yes. The system is specifically suitable for pharmaceutical packaging development, validation and quality control.

Can the instrument comply with pharmacopoeia requirements?

Yes. The instrument supports water vapor permeability testing required by pharmacopoeia and pharmaceutical packaging standards.

Can both water and desiccant methods be performed?

Yes. Both methods are supported in the same instrument.

What is the advantage of fog-free humidity generation?

Fog-free humidity eliminates false transmission results caused by condensed water droplets.

Is GMP software available?

Yes. An optional GMP computerized system module supports audit trails, user management and data integrity requirements.

Does this product have other names?

English

Gravimetric WVTR Tester
Water Vapor Transmission Rate Tester
Pharmaceutical Packaging WVTR Tester
Water Method WVTR Tester
Desiccant Method WVTR Tester
Moisture Permeability Analyzer
Flexible Packaging WVTR Test
Gravimetric Water Vapor Transmission Rate Tester
Desiccant Method WVTR Tester
Pharmacopoeia Water Vapor Permeability Tester
Water Vapor Barrier Testing Equipment
Gravimetric Moisture Transmission Analyzer

German

Gravimetrischer Wasserdampfdurchlässigkeitsprüfer

French

Analyseur Gravimétrique de Transmission de Vapeur d'Eau

Spanish

Analizador Gravimétrico de Permeabilidad al Vapor de Agua

Portuguese

Testador Gravimétrico de Permeabilidade ao Vapor de Água

Japanese

医薬包装用重量法水蒸気透過率試験機

Function
Water vapor permeability testing.
Water vapor transmission rate, permeability rate, permeability coefficient. Used for membranes, films, sheets, containers, and building materials made of materials such as plastic, fabric, leather, metal, etc.
Principle
Balance Weighing: Water method and desiccant method are integrated, upright or inverted test cup both supported. Desiccant (desiccant method) or water (water method) is placed in the cup; seal the cup with specimen, place it in the test chamber; control the temperature, humidity and airspeed of the test chamber; the humidity difference between cup’s inside and outside drives water vapor to permeate the sample; the mass of the sample cup increases or decreases; weighing the at a regular intervals, calculate the water vapor permeation and other performance parameters of the sample.
Standards
Pharmacopoeia - Method for Determination of Water Vapor Permeability, GB/T 1037、YBB 00092003、ASTM E96、ISO 2528、GB/T 17146、GB/T 12704、GB 19082、GB/T 21332、QB/T 2414、TPPI T464、ASTM D1653、YY0471.2、DIN 53122, etc.
Features
- Strict compliance with U.S. and international standards.
- Testing for 48 hours with a testing error less than 0.05 g/m²•24h, and the error attenuates to zero as the testing time increases.
- Fog-free humidifier: Completely gaseous, no fog, avoiding false permeation caused by fog settling.
- Built-in humidifier: Moisture directly enters the test chamber, bypassing the low-temperature zone to ensure stable high humidity.
- Patented permeable cup: No plastic on the exterior of the cup(to avoid water absorption), non-slip design (no distortion of the sample), reliable sealing.
- Temperature and humidity: Automatic humidity control, automatic water replenishment; semiconductor cooling and heating for bidirectional temperature control.
- Balance protection: Patented balance heat insulation and moisture-proof technology to ensure stability and longevity of the balance.
- Uniform airspeed: Double-plane spiral circulation air, uniform airspeed, humidity field, and temperature field.
- Fully automatic: One-key testing, automatic ending, and data saving; desiccant replacement of dryer is not required (once a year).
- Working environment: Indoor, constant temperature or humidity environment is not required(reducing operating costs), testing data can’t affected by environmental temperature and humidity.
- Self-diagnosis of faults: Self-check at startup to avoid testing in a faulty state.
- Data recording: Graphical, recording throughout the process with all elements, data not lost in case of power outage.
- Data security: Optional "GMP Computerized System" software module with user management, permission management, data audit trail, and other functions.

Specifications

Parameter	Value			Parameter			Value
Measurement Range	Film: 0.05-10,000 g/m2•24h Container: 0.0002-30 g/pkg•24h			Measurement Error			Film: 0.05 g/ m²•24h Container: 0.0002 g/pkg•24h
Balance Range	210 g			Balance Resolution			0. 1 mg
Temperature Range	15-45℃			Temperature Error			±03 ℃
Humidity Range	10% - 90%			Humidity Error			±2% RH
Airspeed	0.03 - 2.5 m/s（stepless speed regulation）			Air Pressure			>0.3 MPa (self-supplied)
Test Area	33 cm²（Other areas can be customized）			Sample Thickness			<3 mm
				Custom Cup Height			<150 mm
Power Supply	AC220V /110V ;50/60Hz			Power			＜2,000 W
Model	Model
	W-B-11-G	W-B-31-G	W-B-41-G		W-B-61-G	W-B-81-G
Sample Quantity	1	3	4		6	8
Mainframe Size	873(L)× 700(B)× 688(H)
Mainframe Net Weight	75Kg	82kg	83 kg		90kg	95kg

Standard Configuration
Testing mainframe, computer, air dryer, professional testing software, sample cups, calibration weight, sampler.
Optional Configuration
GMP Computerized System software module, wax-sealed sample cups.
Self-supplied
Compressed air, distilled water, desiccant.

Keywords:

Water Vapor Transmission Rate Analyzer - Electrolytic Method

Water Vapor Transmission Rate Analyzer