Description
WVTR 920 is based on the electrolytic sensor method and available for the water vapor permeability test of flexible films, sheeting and packages. It can test 3 specimens in one operation with independent results.
WVTR 920 Water Vapor Permeability Tester
WVTR 920 is based on the electrolytic sensor method and available for the water vapor permeability test of flexible films, sheeting and packages. It can test 3 specimens in one operation with independent results.
Application Content
WVTR 920 is based on the electrolytic sensor method and available for the water vapor permeability test of flexible films, sheeting and packages. It can test 3 specimens in one operation with independent results.
Films
Plastic films, aluminum foil, aluminized films, plastic composite films, paper-plastic composite films, coextruded films, aluminum foil composite films and many others.
Packages
Plastic, rubber, paper, paper-plastic composite, glass and metal packages, e.g. red wine bottles, blister, various plastic bottles, beverage bottles, peanut oil packages, composite paper packaging materials, vacuum bags, metal three-piece cans, plastic packages for cosmetic, soft tubes for toothpaste, jelly and yogurt cups.
Features Content
- Electrolytic sensor method
- Own technology
- Film and package test
- 3 specimens test simultaneously and independently
- One-button test, test automatically in whole process
- Multiple test modes optional
- Data curves display
- Computer control
- Digital flow adjustment
- 3 Chambers with 3 temperature sensors
- Environment temperature and humidity sensor inside
- Chambers water bath technology
- Unit based on embedded system,24bit Δ-Σ AD
- Pressure, ppm water sensor and temperature overload protection
- Traceable reference film calibration
- Supports DSM system (DSM, lab data management system)
Principles Content
Film
The specimen is clamped between the upper and lower chamber, the upper chamber is purged by high humidity nitrogen stream, and the other side of specimen, lower chamber is purged by a stream of dry nitrogen, due to the effect of water concentration gradient at two sides of the specimen, water molecules will permeate through the specimen into the dry nitrogen side, penetrated water molecules will be carried to the electrolytic sensor which generates the proportional signal, so water vapor transmission rate will be obtained by calculating the sensor signal.
Package
The package is mounted on the lowerchamber,the outside of the package is specified relative humidity, the inside of the package is purged by a dry nitrogen stream, water vapor will permeate through the wall into the inside of the package, penetrated water molecules will be carried to the electrolytic sensor which generates the proportional signal, so water vapor transmission rate will be obtained by calculating the sensor signal.
Technical Indexes Content
Test range：
Film: 0.001-52 g/m2·24h (Standard)
0.01-1100 g/m2·24h (Optional)
Resolution: 0.001 g/m2·24h
Package: (optional)
0.0001~0.5 g/pkg·d
Resolution: 0.00001g/pkg·d
Specimen amount: 3 specimens, independent
Temperature range: 5C–95C
Temperature accuracy: ±0.1C
Humidity range: 0%RH,35%RH-90%RH,100%RH, standard condition 90%RH
Humidity accuracy: ±1%RH
Test area: 48cm2
Specimen size: Film: size: >=150mm * 94mm; thickness: less 3mm
Package: max size: D120mm * 400mm
Carrier gas: 99.999% Nitrogen
Carrier flow: 0~200 ml/min
Gas interface: 1/8inch
Power supply: AC 220V 50Hz
Dimension: 730mm(L) * 590mm(W) * 350mm(H)
Net weight: 56kg
Standards Content
ISO 15106-3, GB/T 21529, DIN 53122-2, YBB 00092003
Configuration Content
Delivery
Main unit, computer, W-TRANS software, temperature controller, tank regulator
PCIE card, communication cable, sample cutter, vacuum grease.
Optional
Package fixtures, reference film, vacuum grease, sample cutter, DSM system.
