PERME W3/030 Water Vapour Transmission Rate Tester
An automated cup method for determining the water vapour transmission rate of barrier polymer & laminated films and breathable substrates used in the medical and construction industries. Three test specimen cups.
The PERMETM W3/030 Water Vapour Transmission Rate Tester uses an automated cup method for determining the water vapour transmission rate of barrier polymer & laminated films and for breathable substrates used in the medical and construction industries. Three test specimen cups.
Standards:
Complies with: ASTM E96, ASTM D1653, TAPPI T464, ISO 2528, DIN 53122-1, JIS Z0208, GB 1037, GB/T 16928, YBB 00092003
Features
- Computer control: automatic testing process
- Three test specimens mounted in three individual test cups
- Test result is the average value of three specimens
- Cups weighed at intervals throughout the test
- Auto-zero before each weighing
- Cylinder cam type lifter lifts and lowers the cups
- Standard wind velocity
- Automatic temperature control
- Automatic humidity control
- Temperature and humidity testing port
- Test report can be stored in doc., database and in spreadsheet formats
- Broad power input
- Two rapid calibration modes of standard weight and of reference films
- Network transmission interface for LAN data management and Internet data transmission.
Testing Principle
Test specimen is mounted in a test cup. A specific humidity difference is created between the two sides of the test specimen at a specific temperature.
The water vapour permeates through the specimen from the inner, more humid side to the drier side. By measuring the weight change of the cup due to the permeation of the water vapour out of the cup, the rate of transmission is determined.
Technical Specifications
| Test range: 0.1 – 10,000 g/m2 per day | Accuracy: 0.01 g/m2 per day |
| Test temperature: 15 °C – 55 °C | Temperature accuracy: +/- 0.1 °C |
| Test humidity: 10% RH – 98% RH (Standard 90% RH) | Humidity accuracy: +/- 1%RH |
| Purge velocity: 0.5 – 2.5 m/s (Non-standard purge velocity can be customized) | Test area: 33 cm2 Ã-3 |
| Number of specimens: 3 pieces | Specimen Diameter: 74 mm |
| Specimen thickness: 3 mm (Can be customized for other thicknesses) | Test chamber volume: 15L |
| Gas source: Air | Gas source pressure: 0.6 MPa |
| Inlet size: Ø 4 mm polyurethane pipe | Power: AC 220V 50Hz |
Physical specifications
- Dimensions: 695 mm x 555 mm x 390 mm (L x B x H)
- Mainframe net weight: 76 kg
Includes:
| Instrument | Software | Communication cable |
| Gas drying device | Automatic dry filter | Calibration weight |
| Cups | Sample cutter | Gas supply valve |
Options:
- Reference film
- air compressor
- desiccant
Note:
- Gas inlet is Ø 4 mm polyurethane pipe
- User to supply compressed air and distilled water
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