Water Vapor Transmission Rate WVTR/MVTR Testers
WVTR (Water Vapor Transmission Rate) and MVTR (Moisture Vapor Transmission Rate) are both widely used terms in the packaging industry to describe the permeability of materials to water vapor.
While WVTR is more common in standards like ASTM F1249, ASTM E96 and ISO 15106-2, MVTR is frequently used in pharmaceutical and medical packaging applications. Labthink’s WVTR testers and MVTR test machines are designed to meet both terminologies and ensure accurate, repeatable testing results. Accurate WVTR testing and MVTR testing are essential for evaluating the barrier properties of packaging materials such as plastic films, aluminum foils, laminated structures, and pharmaceutical blister packs.
Whether you're conducting WVTR measurement for regulatory compliance, MVTR testing for R&D, or production quality assurance, Labthink's instruments deliver reliable data and user-friendly operation.The equipment supports both dry and wet methods and can be configured for flexible films, sheets, bottles, and containers.
Labthink offers water vapor transmission rate testers that provide high sensitivity, fast test cycles, and full compliance with international testing standards.
- ISO 15106-2 - Plastics -- Film and sheeting -- Determination of water vapour transmission rate -- Part 2: Infrared detection sensor method
- ASTM F1249 - Standard Test Method for Water Vapor Transmission Rate Through Plastic Film and Sheeting Using a Modulated Infrared Sensor
- ISO 2528 - Sheet materials -- Determination of water vapour transmission rate -- Gravimetric (dish) method
- ASTM E96 - Standard Test Methods for Water Vapor Transmission of Materials
- ASTM D1653 - Standard Test Methods for Water Vapor Transmission of Organic Coating Films
Frequently Asked Questions (FAQ)
What is WVTR and why is it important?
WVTR (Water Vapor Transmission Rate) measures how much water vapor passes through a material over time. It’s a critical parameter for evaluating the moisture barrier performance of packaging materials, especially in food, pharmaceutical, and electronic industries.
Is there a difference between WVTR and MVTR?
WVTR and MVTR (Moisture Vapor Transmission Rate) are often used interchangeably. Both describe the transmission rate of water vapor through materials. MVTR is more commonly used in medical and textile contexts, while WVTR appears in packaging and industrial standards like ASTM F1249 and ASTM E96.
What test standards are supported by Labthink WVTR testers?
Labthink WVTR testing equipment supports international standards including ASTM F1249, ISO 15106-2, and ASTM E96, ensuring compliance across global markets.
Can your WVTR testers also be used for MVTR testing?
Yes. Our instruments are capable of both WVTR and MVTR testing. They provide reliable, repeatable results for moisture barrier performance of flexible packaging films, laminates, and medical materials.
Do you offer technical support or demo service?
Absolutely. You can request a free technical consultation or schedule an online demo with our specialists. We also provide test reports and brochures for download.