Control tester C390H

water vaporwater vapor permeabilitycalibration

Water Vapor Transmission Rate (WVTR) test system C390H is an automated infrared-sensor-based instrument designed to measure WVTR of medium- and high-barrier materials in compliance with ISO 15106-2 and ASTM F1249. It supports simultaneous testing of three specimens with precise temperature, humidity and carrier-gas flow control, suitable for films, sheets and whole-package testing across food, pharmaceutical, medical, electronics and industrial applications.

Key functionality and design

• Proprietary infrared water-vapor sensor providing high sensitivity and stability without frequent range-specific calibration.
• Patented integrated three-cell testing block with optimized hydrodynamic and thermodynamic layout for improved measurement uniformity across cells.
• Automatic control of temperature, humidity and flow rate with independent monitoring sensors for each test cell.
• Three identical test cells enable parallel testing of three specimens under identical conditions for higher throughput.
• 12" touch-screen pad (Windows 11) and optional DataShield™ software for automated data management and export.

Test principle
The specimen is mounted in a diffusion cell divided into a dry chamber and a controlled-humidity chamber. Dry high-purity nitrogen sweeps the dry side; permeating water vapor is carried by the carrier gas to the infrared sensor and converted to electrical signals from which WVTR is calculated. For whole-package specimens, nitrogen flows inside the package while the outside is maintained at high humidity.

Test standards

• ISO 15106-2
• ASTM F1249
• GB/T 26253
• JIS K7129
• YBB 00092003-2015

Applications

• Basic applications
  • Films: plastic films, paper-plastic composite films, coextruded films, aluminum foils and aluminum-composite films.
  • Sheeting: PP, PVC, PVDC sheets, metal foils, rubber pads, silicon wafers.
  • Packages: plastic bottles, pouches, coated paper cartons, vacuum bags, metal cans, cosmetic packaging, soft tubes, cups.
• Extended applications
  • Closure systems for bottles, cartons and pouches.
  • Solar back-sheets for PV modules.
  • Plastic tubes (e.g., cosmetic tubes) and blister packs (whole-package WVTR).
  • Automotive plastic fuel tanks and battery plastic shells.

Technical specifications

• Model: C390H
• Standard WVTR range: 0.005 ~ 40 g/(m2·day)
• Optional range: 0.005 ~ 100 g/(m2·day)
• Package test range (optional): 0.000025 ~ 0.2 g/(pkg·day), max package volume 3 L (optional)
• Resolution: 0.0001 g/(m2·day)
• Repeatability: 0.005 g/(m2·day) or 2%
• Test temperature range: 10 ~ 55 °C ±0.2 °C
• Test humidity range: 5% ~ 90% RH ±1% and 100%
• Test chamber: 3 test chambers (three-cell integrated block)
• Specimen size: 108 mm × 108 mm; thickness ≤ 3 mm; standard test area 50 cm²
• Carrier gas: 99.999% high-purity nitrogen (not supplied); carrier gas pressure ≥ 0.28 MPa / 40.6 psi; port: 1/8" metal tubing
• Optional functions: package test (3 L max), DataShield™ system, GMP-compliant computer system, CFR21 Part11 support (all optional)