Humidity tester W3/031

temperaturewater vapor permeabilityair velocity

The W3/031 is a professional, high-end and intelligent Water Vapor Transmission Rate (WVTR) tester designed for accurate measurement of water vapor permeability of film and sheet specimens using the cup method. It features three independent test dishes, automatic weighing and embedded computer control for reliable, standardized test data.

Product Features

• Professional: Based on the cup method; three individual test dishes; fully automated testing process conforming to international standards.
• Standard periodically weighing method with auto-zero before each weighing to guarantee accuracy and uniformity of test data.
• Wide-range, high-precision automatic temperature and humidity control supporting various non-standard test conditions.
• Standard air velocity management to maintain a constant humidity difference between the two sides of test dishes.
• Fast-access calibration ports for temperature and humidity; reference film or standard weight for quick calibration.
• High-end: Labthink patent mechanical weighing structure for precision during weighing; embedded computer control system (LCD monitor, keyboard, mouse) that does not require an external PC; four USB ports and dual Internet ports for I/O and data transfer.
• Intelligent: Latest operating software with user-friendly interface; intelligent data management and support for Lystem™ Lab Data Sharing System; sensor calibration reminders, embedded help document, English/Chinese operating language, multi-level account control, detailed data saving and report patterns, calibration data recovery and automatic data comparison.

Principle
Under a set test temperature a constant humidity difference is generated between the two sides of the specimen; water vapor permeates through the specimen into the dry side and the weight changes of the test dish over time are measured to obtain WVTR and related parameters.

Standards
ISO 2528, GB 1037, GB/T 16928, ASTM E96, ASTM D1653, TAPPI T464, DIN 53122-1, JIS Z0208, YBB 00092003.

Applications

• Basic Applications: Films (plastic films, composite films, paper-plastic composites, geomembranes, co-extruded films, aluminized films, aluminum foils and composites, breathable waterproof films, etc.), Sheeting (engineering plastics, rubber, waterproof building and thermal insulation materials such as PP, PVC, PVDC, nylon), Paper and Paper Board, Textiles and Nonwovens.
• Extended Applications: Inverted cup method testing (requires inverted cups), Solar back-sheets and OLED packaging materials, LCD monitor films, Aseptic wound-protecting films, face masks and protective clothing materials.

Configurations

• Standard Configurations: Instrument, LCD Monitor, Keyboard, Mouse, Test Dishes, Desiccant Tube, Automatic Moisture Filter, Standard Weight, Round Sample Cutter, Valve Set and Professional Software.
• Optional Parts: Reference Film, Air compressor, Desiccant and Lystem™ Lab Data Sharing System.
• Notes: Gas supply port is Φ4 mm PU tubing; customers must prepare gas supply and distilled water.

Caractéristiques / Spécifications techniques

• Test Range (film): 0.1 ~ 10,000 g/m² · 24h (standard)
• Number of Specimens: 1 ~ 3 with independent test results
• Accuracy: 0.01 g/m² · 24h
• Resolution: 0.0001 g
• Temperature Range: 15°C ~ 55°C (standard)
• Temperature Accuracy: ±0.1°C (standard)
• Humidity Range: 10%RH ~ 98%RH
• Humidity Accuracy: ±1%RH
• Air Velocity: 0.5 ~ 2.5 m/s (customization available)
• Test Area: 33 cm²
• Specimen Thickness: ≤ 3 mm (customization available)
• Specimen Size: Φ74 mm
• Test Chamber Size: 27 L
• Gas Supply: Air
• Gas Supply Pressure: 0.6 MPa
• Port Size: Φ4 mm PU Tubing
• Instrument Dimension: 580 mm (L) x 680 mm (W) x 470 mm (H)
• Power Supply: 220VAC 50Hz / 120VAC 60Hz
• Net Weight: 83 kg