Humidity tester C360H

controltemperatureair flow

The C360H Water Vapor Transmission Rate Tester is a gravimetric, ASTM E96‑compliant system for measuring water vapor transmission rate (WVTR) of barrier materials across a wide permeability range. It integrates Labthink's patented multi-dish test chamber, precision balance and embedded software for automatic control of temperature, humidity and air flow to deliver sensitive, repeatable results.

Key features

• High precision
  • Patented test chamber and dishes with advanced hydrodynamic and thermodynamic design for uniform flow over the specimen.
  • Proprietary thermostat technology ensures stable temperature control of the test chamber (±0.2 °C).
  • Precise regulation and calculation of test conditions for improved sensitivity and repeatability.
• High efficiency
  • 12 test stations for parallel testing to increase throughput.
  • Supports both desiccant (dry) and water (wet) gravimetric methods.
• Labor saving
  • Automatic control of humidity and carrier gas flow.
  • Long‑life desiccator design requiring no inner-core replacement (continuous operation up to 20,000 hours).
  • High‑efficiency, mist‑free humidity generator.
• Simplified operation
  • 12-inch touch screen running Windows 10 for intuitive control.
  • Fast automated test procedures and optional DataShield™ for centralized data management.

Product features (summary)

• New‑generation multi-dish test chamber ensures uniform airflow across the specimen surface, stable environmental control, shorter test duration and improved measurement accuracy.
• Suitable for high-, medium- and low-barrier materials with precise real‑time control of temperature, humidity and air velocity.
• Automatic monitoring and regulation of air velocity; mist‑free humidification and continuous long‑term operation without desiccator core replacement.
• Optional DataShield™ system for secure centralized data storage and multiple export formats; optional GMP computer and CFR21 Part11 support.

Test principle
The specimen is mounted in a test dish containing water (water method) or a desiccant (desiccant method). The dish is placed into the chamber where temperature, humidity and airflow are controlled. Water vapor permeates the specimen toward the dry side; periodic mass changes of the dish are recorded to calculate WVTR and related parameters.

Test standards

• ASTM E96
• ASTM D1653
• ISO 2528
• TAPPI T464
• DIN 53122-1
• GB/T 1037
• GB/T 16928
• YBB 00092003-2015

Applications

• Basic applications
  • Films: plastic films, plastic composite films, coextruded films, metallized/aluminum films and film composites.
  • Sheeting: PP, PVC, PVDC sheets, metal foils, rubber pads and similar sheet materials.
  • Paper and paperboard: aluminum‑coated paper, paper‑plastic composite materials and related substrates.
  • Textiles and nonwovens: fabrics and nonwoven materials.
• Extended applications
  • Construction materials: geotextiles, roofing and building membranes, vapor barrier membranes.
  • Medical and protective films: aseptic wound‑protection films, medical plasters, protective clothing materials.

Technical specifications

• Model: C360H
• Testing principle: Gravimetric determination (desiccant method / water method)
• Test stations: 12
• Measurable WVTR ranges (examples): 0.01 g/(m²·day) ~ 0.5 g/(m²·day); 0.5 g/(m²·day) ~ 5 g/(m²·day); >5 g/(m²·day)
• Max. test range (water method): up to 10000/n (1–12) g/(m²·day) (model-dependent)
• Max. test range (desiccant method): up to 1200 g/(m²·day) per piece
• Specimen size: Ø74 mm
• Specimen thickness: ≤ 3 mm
• Standard test area: 33 cm²
• Test temperature: 20 ~ 55 °C ±0.2 °C
• Test humidity: RH 10% ~ 90% ±1%
• Carrier gas: compressed air (pressure ≥ 0.6 MPa)
• Port size: Ø6 mm (PU tubing)
• Drying: long‑life desiccator (no inner-core replacement required)
• Humidifying: high‑efficiency mist‑free humidity generator
• Computer/software: optional GMP computer system; optional CFR21 Part11 support; optional DataShield™