Humidity testing system C303H

controltemperaturewater vapor permeability

Overview

The C303H is a laboratory-grade water vapor transmission rate (WVTR) test system for precise, repeatable WVTR measurements of films, plastics and sheet materials. It uses a patented infrared moisture sensor and supports standard test methods such as ASTM F1249, ISO 15106-2 and JIS K7129.

Key features

• Infrared moisture sensor: patented non‑consumable infrared sensor providing low detection limits, over-limit alarm and automatic protection.
• Accurate data: 360° air‑circulation constant‑temperature control, high‑precision temperature and humidity sensors, automated control of flow, temperature and RH; repeatability down to 0.005 g/(m²·day).
• Three independent chambers: three 50 cm² standard‑area chambers for parallel testing of three samples under identical conditions with independent data and automatic sample clamping for consistent sealing.
• Intelligent control: 12-inch Windows touch panel with automatic mode for one‑click start; drawer‑type chambers with one‑key automatic in/out and audible/visual alerts.
• Safety and reliability: embedded industrial computer, optical/intelligent sensors and sound‑light alarms; built with globally sourced components for stable long‑term operation.
• Advanced functions: professional testing mode, automatic generation of WVTR and related curves; configurable extended ranges and optional software/compliance packages.

Testing principle

• A pre‑treated sample is clamped between high‑ and low‑humidity chambers. Humidified nitrogen flows on the high‑humidity side and dry nitrogen on the low‑humidity side. Water vapor diffuses through the sample to the low‑humidity side, where dry nitrogen carries the vapor to the infrared sensor. The sensor signal is analyzed and converted to WVTR values.

Reference standards

• ASTM F1249
• ISO 15106-2
• GB/T 26253
• JIS K7129
• YBB00092003-2015

Test applications

• Films: WVTR testing for plastic films, paper–plastic laminates, co‑extruded films, metalized films and multi‑layer composites — suitable for packaging barrier evaluation in food, pharmaceutical and electronics sectors.
• Sheets: WVTR testing for PP, PVC, PVDC, metal foils, rubber and silicone sheets — applicable for manufacturers and QC laboratories requiring precise permeation data.

Technical specifications

• Test scope (standard area 50 cm²): 0.005–40 g/(m²·day) standard; optional 0.005–100 g/(m²·day).
• Mask areas (optional): 5 cm²: 0.05–400 g/(m²·day); 1 cm²: 0.25–2000 g/(m²·day).
• Resolution: 0.0001 g/(m²·day).
• Repeatability: 0.005 g/(m²·day) or 2%, whichever is greater.
• Temperature range: 15–50 °C (standard); 5–60 °C (customized).
• Temperature fluctuation: ±0.05 °C.
• Humidity range: 5–90% RH ±1% (within standard temperature range).
• Test chamber: 3 independent chambers; standard test area 50 cm² per chamber.
• Sample size: 11.2 cm × 11.2 cm (4.4” × 4.4”).
• Max sample thickness: ≤ 3 mm (120 mil).
• Carrier gas: 99.999% high‑purity nitrogen (user supplied).
• Air source pressure: ≥ 280 kPa (40.6 PSI); machine inlet specifications may require ≥ 550 kPa (79.7 PSI), inlet Φ6 mm polyurethane.
• Interface size: 1/8" metal tube.
• Dimensions: 60 cm × 50 cm × 70 cm (H×W×D).
• Power supply: 120 VAC ±10% 60 Hz or 220 VAC ±10% 50 Hz.
• Net weight: 100 kg (220 lbs).
• Standard configuration: mainframe, tablet computer, sampler, vacuum grease, Ø6 mm polyurethane tubing.
• Options: air compressor; CFR21 Part 11 / GMP computer systems; DataShield™ data management (optional).