PERME W3/0120 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. 12 independent chambers can be used to test up to 12 different materials / test specimens simultaneously.
The PERMETM W3/0120 Water Vapour Transmission Rate Tester uses 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.
12 independent chambers are available to test up to 12 different materials / test specimens simultaneously. The test conditions are selectable and the test data can be statistically grouped and stored. Historic stored data can be recalled & displayed.
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
- 12 independent chambers
- Interval weighing measurement
- Auto-zero before each weighing
- Cylinder cam type lifter lift and lower the cups
- Standard wind velocity
- Heating and cooling – automatic temperature control
- Automatic humidity control
- Temperature and humidity testing port
- Specific function compliance
- Two rapid calibration modes of standard weight and reference films
- RS232 interface
- Network transmission interface for LAN data management and Internet data transmission
Testing Principle
A 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 – 10,000g/m2 per day | Numbers of specimen: 1-12 pieces | Test accuracy: 0.01g/m2 per day |
| Resolution: 0.0001 g | Test temperature: 15 °C – 65 °C | Temperature accuracy: +/- 0.1 °C |
| Test humidity: 40% RH – 95% RH (Standard 90% RH) | Humidity accuracy: +/- 1%RH | Purge velocity: 0.5 – 2.5 m/s (non-standard, optional) |
| Test area: 33 cm2 | Specimen thickness: Max. 3 mm | Specimen size: 74 mm |
| Testing chamber volume: 80L | Gas source: Air | Gas source pressure: 0.6 MPa |
Physical specifications
- Power: AC 220V 50Hz
- Dimensions: 826 mm x 726 mm x 702 mm (L x B x H)
- Mainframe net weight: 114 kg
Includes:
| Instrument | Calibration weight |
| Software | Gas drying device |
| Auto dry filter | Communication cable |
| Cups | Sample cutter |
Options:
- Reference film
- Air compressor
- Desiccant
Note:
- The gas inlet is Ø 4 mm polyurethane pipe
- User to supply compressed air and distilled water
Related products in the PERME series: