Brugger Feinmechanik GmbH
Erzgießereistraße 30
D-80335 Munich
+49 89 525507
+49 89 5233436
WDDG - Water Vapour Permeability Testers
You can use the WDDG to determine the WVTR (of up to 10 g/m2 d) for your specimen.
The sample is put between the top and bottom part of the permeation cell. A constant water-vapour pressure (RH) is adjusted in the upper part of the permeation cell using saturated saline or defined sulphuric acid solutions. The carrier gas (nitrogen 5.0) is pre-dried inside the WDDG. Then the carrier gas is fed into the bottom part of the permeation cell. The flow of carrier gas absorbs the water vapour that permeats through the sample and transmits it to the Keidel electrolytic cell. There the amount of water vapour is quantitatively recorded. The electronic system registers the current and displays the WVTR directly in the corresponding unit (grams of water as per square meter and day) using a 7 segment display.
The sample is put between the top and bottom part of the permeation cell. A constant water-vapour pressure (RH) is adjusted in the upper part of the permeation cell using saturated saline or defined sulphuric acid solutions. The carrier gas (nitrogen 5.0) is pre-dried inside the WDDG. Then the carrier gas is fed into the bottom part of the permeation cell. The flow of carrier gas absorbs the water vapour that permeats through the sample and transmits it to the Keidel electrolytic cell. There the amount of water vapour is quantitatively recorded. The electronic system registers the current and displays the WVTR directly in the corresponding unit (grams of water as per square meter and day) using a 7 segment display.
The test duration depends on the WVTR of the inserted specimen. At the beginning of the test the displayed value continuously increases. You can track this increase of the WVTR with a plotter. As soon as the procedure has reached the final value (no further increase), you can stop the test.
You can adjust the sample temperature within the range of -25°C and 60°C using an external
You can adjust the sample temperature within the range of -25°C and 60°C using an external
| Specification | |
| Measuring Range |
0.005 g/(m² d) bis 10 g/(m² d) |
| Resoluting within the measuring ranges |
0.001 g/(m² d), 0.01 g/(m² d), 0.1g/(m² d) |
| Measuring ranges for the plotter output (100mV) |
0.1 g/(m² d), 1 g/(m² d), 10g/(m² d) |
| Sample dimensions |
Circular, diameter 115 mm |
| Sample temperaturerange |
-25°C bis 80°C (with external water bath thermostat) |
| Carrier gas |
Nitrogen 3.5 (99,95% Vol, Dew Point -72°C), dry - ca. 100 cm³/min |
| Gas flow of the carrier gas |
Nitrogen - 40 cm³/min to max 70 cm³/min for WDDG with MEECCo elektroliecell |
| Secondary drying | Molecular sieve 0.4 mm, pearl diameter 2 mm |
| Cell voltage | 50 V |
| Dimensions |
50 x 35 74 cm |
| Weight | 30 kg |
| Storage temperature |
0°C - 50°C |
| Working temperature |
Ambient temperature( 23°C ) |
| Relative humidity |
max. 80%, non-condensing |
| Electrical connection WDDG |
230 V / 50 - 60Hz, power consumption ca. 50 W, approx |
| Electrical connection for the plotter |
230 V / 50 - 60Hz, power consumption ca. 50 W, approx |
| Electrical connection (Thermostat) |
230 V / 50 - 60Hz, power consumption ca. 2300 W, approx |
| Standart |
ISO 15106 - 3 |
Accessories
Optionales Accessories
- Pin Plotter (100 mV) for illustrating
- Thermostat for controlling the test temperature between -25°C and 60°C
- DMG Sample Thickness Tester
- Mains Connection
- Clean Nitrogen (N2 - Quality 0.5)
- 1-3 bar connection (such as O2)
- Hight-Vacuum Grease
- Electrolytic Cell
- Molecular Sieve
- Pertroleum Ether (cleaning agent for films and the film support)
- Clean Nitrogen (N2 - Quality 5.0)
- Spare Aluminium Blocking Foil
- Sintered glass discs for moisturising the permeation cell
- Filter Discs for Dry Cells
- Sealing Rings
- Fuses