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Test principle
Desiccant inside the specimen cup (weight gain method) or place water (weight loss method); seal the specimen cup with the specimen and place it inside the test chamber; control the temperature, humidity and wind speed of the test chamber; the difference of humidity inside and outside the specimen cup, drive the water vapor to penetrate the specimen, the mass of the specimen cup increases or decreases; weigh the mass of the specimen cup at regular intervals and calculate the water vapor transmission amount of the specimen and other performance parameters.
Standard
ASTM E96、GB/T 1037、ASTM D1653、ISO 2528、TAPPIT464、DIN 53122-1、YBB00092003
Technical parameters
| Item | Parameters |
| Measuring Range | 0.05~10.000 g/(m²·24h) |
| Resolution | 0.0001 g/(m²·24h) |
| Number of Testing Stations | 6 |
| Measuring Range of the Balance | 220 g |
| Division Value of the Balance | 0.1 mg (0.01 mg optional) |
| Temperature Control Range | 10~50℃ ±0.1℃ |
| Wind Speed | 0.3~2.5 m/s (0.03~0.5 m/s optional) |
| Humidity Control Range | (5~90) %RH |
| Humidity Control Accuracy | ±2%RH |
| Standard Testing Area | 33 cm² |
| Sample Size | Φ74 mm |
| Sample Thickness | ≤3 mm |
| Testing Method | Weight Gain Method, Weight Loss Method |
| Specification of Carrier Gas | Compressed Air |
| Gas Source Pressure | ≥0.6 MPa |
| Overall Dimensions | 830 mm×670 mm×440 mm |
| Interface Size | Φ6 mm Polyurethane Tube |
| Weight | 75 kg |
| Power Supply | AC 220 V, 50 Hz |
