WVTR Permeation Analyzer - Electrolytic Method

W-E-41-G

Water Vapor Transmission Rate Tester

 Electrolytic Sensor Method WVTR Analyzer

Accurate Water Vapor Barrier Testing for Films, Sheets, Containers and High-Barrier Packaging Materials

The LabStone Electrolytic Sensor Water Vapor Transmission Rate Tester is designed for accurate determination of water vapor permeability properties of flexible packaging materials, pharmaceutical packaging, barrier films, containers, laminated structures, textiles, construction materials and advanced functional materials.

Using an absolute electrolytic detection sensor, the system delivers highly sensitive and stable WVTR measurements for quality control, product development, regulatory compliance and barrier performance evaluation.

Function：

Determining water vapor permeability characteristics of materials and container.

Suitable for: Film, sheet, container and construction material of plastic, textile, leather and metal.

Principle:

The instrument employs the Electrolytic Detection Sensor Method.

A humidified nitrogen stream flows on one side of the specimen while a dry nitrogen carrier gas flows on the opposite side.

The humidity difference creates a driving force that causes water vapor molecules to permeate through the specimen.

The transmitted water vapor is carried by dry nitrogen into the electrolytic sensor chamber.

The sensor electrolyzes all incoming water vapor molecules and directly measures the absolute amount of water passing through the specimen.

The system automatically calculates:

• Water Vapor Transmission Rate (WVTR)
• Water Vapor Permeability
• Moisture Barrier Performance

This method is highly sensitive and particularly suitable for medium and high-barrier materials.

Compliant Standards

The instrument complies with internationally recognized standards including:

International Standards

• ISO 15106-3
• ASTM F3299
• JIS K7129
• DIN 53122-2

China Standards

• GB/T 21529
• Current YBB standards for pharmaceutical packaging materials
  
  

Characteristics:

• Electrolytic detection sensor, absolute Coulometric sensor
• Ultra high precision, while relative error is stable.
• Humidity control ability: 35%~90%RH, fully automatic, fogless.
• Temperature control feature: Semiconductor cold and hot bidirectional control, High precision, stable and reliable.
• Strong environmental adaptability: Indoor environment, temperature 10 ~ 30 ℃, any humidity, low cost of use.
• Sample installation: Pneumatic clamp sample (H-type). Sample anti leakage sealing installation technology.
• Intelligent and automatic: power-on self-check to avoid test under fault state; one click start, fully automatic testing.
• Software: graphical, whole process and all element monitoring; multiple report formats.
• Optional: software module of GMP computerized system.。

Specification:

System Configuration: 

Mainframe, testing computer, professional testing software, water trap, sampler, nitrogen cylinder pressure reducing valve, sealing grease. 

Optional: GMP computerized system function module, container test component, container temperature control test component, specimen MASK (7cm²/1cm²）.

Self-Supply: High purity nitrogen, distilled water.

Why Water Vapor Transmission Rate Testing Matters

Water vapor is one of the primary factors affecting product stability, shelf life and packaging performance.

Excessive moisture penetration may cause:

• Food spoilage
• Loss of product freshness
• Pharmaceutical degradation
• Reduced drug efficacy
• Corrosion of electronic components
• Failure of moisture-sensitive materials
• Reduced service life of barrier packaging

Therefore, WVTR testing has become a critical quality parameter for modern packaging and material industries.

Applications

Flexible Packaging Industry

Suitable for:

• Food packaging films
• Vacuum packaging
• Modified atmosphere packaging (MAP)
• Retort packaging
• High-barrier multilayer films

Typical materials:

• PE
• PP
• PET
• EVOH
• PVDC
• PA
• Aluminum coated films
• Laminated films

Pharmaceutical Packaging

Water vapor protection is critical for pharmaceutical products.

Applications include:

• Blister packaging
• Pharmaceutical pouches
• Sachets
• Medical device packaging
• Drug packaging films
• Pharmaceutical composite materials

WVTR testing helps ensure compliance with pharmaceutical packaging requirements and product stability studies.

Medical and Healthcare Packaging

Suitable for:

• Sterile barrier systems
• Medical device packaging
• Surgical packaging
• Disposable healthcare products

Electronics and New Energy Materials

Applicable for:

• Flexible electronic films
• OLED barrier films
• Battery packaging materials
• Functional barrier membranes
• Electronic protective films

Building Materials Industry

Used to evaluate moisture transmission characteristics of:

• Waterproof membranes
• Roofing materials
• Construction films
• Insulation materials
• Vapor barriers

Textile and Functional Fabric Industry

Suitable for:

• Breathable fabrics
• Waterproof textiles
• Sportswear materials
• Technical textiles

Industries Served

• Packaging Manufacturers
• Pharmaceutical Companies
• Medical Device Manufacturers
• Food Producers
• Barrier Film Producers
• Electronics Manufacturers
• Battery Material Developers
• Universities and Research Institutes
• Third-Party Testing Laboratories
• Quality Inspection Agencies
  
   

Frequently Asked Questions (FAQ)

What is WVTR?

WVTR (Water Vapor Transmission Rate) measures the amount of water vapor passing through a material over a specified period under controlled conditions.

Why is WVTR important?

WVTR directly affects product shelf life, moisture protection performance and packaging quality.

Which industries require WVTR testing?

Food packaging, pharmaceutical packaging, medical packaging, electronics, construction materials, textiles and advanced barrier materials industries.

What is the advantage of the electrolytic sensor method?

The electrolytic sensor method provides high sensitivity, excellent stability and reliable measurement for medium and high-barrier materials.

Can this instrument test containers?

Yes. Optional container test accessories allow testing of bottles, cups, pouches and other package formats.

What materials can be tested?

Films, sheets, laminated materials, textiles, medical packaging materials, construction materials and containers.

What carrier gas is required?

High-purity nitrogen (99.999%) is recommended for optimal performance.

Is the instrument suitable for pharmaceutical packaging testing?

Yes. It is widely used for pharmaceutical packaging development, quality control and stability studies.

How does WVTR affect food shelf life?

Higher WVTR values allow more moisture penetration, which may accelerate spoilage and reduce product shelf life.

Does this product have other names?

Common industry names include:

• Water Vapor Transmission Rate Tester
• WVTR Tester
• WVTR Analyzer
• Water Vapor Permeability Tester
• Water Vapor Permeation Tester
• Moisture Permeability Analyzer
• Water Vapor Barrier Tester
• Moisture Transmission Rate Tester
• Moisture Barrier Testing Equipment
• Electrolytic WVTR Analyzer
• Water Vapor Permeation Tester
• Electrolytic Sensor WVTR Tester
• Packaging Permeability Tester
• Pharmaceutical Packaging WVTR Test
• Film Water Vapor Permeability Tester