| Method | Cup method |
| Measuring Range | 0.02 to 10,000 g/(m²•24h) |
| Systemic Resolution | 0.0001 g/ (m²•day) |
| Test Precision | 0.02 g/(m²•24h) |
| Sample Quantity | 1 |
| Temperature Range | 5 to 55℃ |
| Temperature Control Precision | ± 0.1℃ |
| Experimental Humidity | 0 to 50% RH |
| Humidity Accuracy | ± 1% RH |
| Power Supply | 220 V 50 Hz |
| Test Area | About 51.53 cm3 |
| Net Weight | 40 kg |
RS232 port
Independent test chamber
Standalone and computer functionality
Touchscreen operation
Automatic error correction
Dessicant in top cover cavity
Our Water Vapour Permeability Tester LWPT-B12 is used in industries such as food packaging, pharmaceuticals, and material research to measure the water vapor permeability of plastic films, sheets, and packaging materials. It ensures accurate moisture barrier evaluation for product protection and quality control.
Name | Quantity |
Molecular sieve | 1 |
Power line | 1 |
Sealing grease | 1 |
Computer cable | 1 |
Sample | 1 |
Labtron Water Vapor Permeability Tester is specialized to measure ability of materials to allow steam to pass through them. They include humidity sensor for accurate moisture measurement in testing environments. Their design features controlled temperature chamber to maintain consistent condition. They utilize high-quality membranes to ensure reliable transmission rates during procedure. Our Water Vapor Permeability Tester is critical for ensuring effectiveness of waterproof materials, breathable fabrics, and dampness barriers in construction.





Labtron’s Water Vapor Permeability Tester operates based on the cup method, where a moisture-permeable cup containing distilled water is placed inside a controlled test cavity. The electric heating device raises the temperature within the cavity, causing the water to evaporate. A desiccant inside the cup absorbs the evaporated water vapor, and the system continuously measures the weight change over time. This change is used to calculate the water vapor transmission rate (WVTR) of the test sample. The instrument employs high-precision sensors and a PID-controlled temperature system to ensure accurate and consistent measurements.
Several industries benefit from our Water Vapor Permeability Tester. The food packaging industry uses it to determine the moisture barrier properties of plastic films and other packaging materials, ensuring extended shelf life and product freshness. The pharmaceutical industry utilizes it to test packaging materials for medicines, ensuring that drugs remain stable under different humidity conditions. Additionally, research institutions and material testing laboratories use the device for studying the permeability of various materials and improving product quality.
This Water Vapor Permeability Tester can function both as a standalone system and with a computer connection. When used independently, it features a touchscreen interface that allows users to control the test parameters and view real-time results. However, for advanced data analysis, report generation, and storage, the device can be connected to a PC via an RS232 interface. The accompanying software enables users to monitor test results, adjust parameters, and export data in formats such as Word and PDF.
Yes, the Water Vapor Permeability Tester is equipped with software that allows users to export test results for further analysis and documentation. The software supports exporting data in Word and PDF formats, making it convenient for users to create detailed reports. Additionally, real-time data visualization, dynamic curve contraction, and historical data storage help in tracking long-term trends and comparing different test samples.
Our Water Vapor Permeability Tester is designed to test one sample at a time, with a test area of approximately 51.53 cm². While it may not accommodate multiple samples simultaneously, its high precision and automation features ensure quick and efficient testing. Users can perform consecutive tests on different materials without significant downtime, making it a reliable tool for quality control in packaging and material research industries.
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Labtron Equipment Ltd., Quatro House, Lyon Way, Camberley, Surrey GU16 7ER United Kingdom
Email: info@labtron.com Whatsapp: +44 73 4441 2688 Phone: +44 2080 043608