GDP-C - Gas Permeability Tester

... is designed for testing the permeability of films. It supports an extended temperature range throug external water bath circulator.

GTT new version available!
  • Different testing gases
  • big temperature bereich
  • Extern evaluation software

GTT - new version available!

How it works

The GDP-C is designed for testing the permeability of dry gases on films and similar materials according to the manometric principle. The sample is put between the top and bottom part of the permeation cell. The volume of the bottom part is as small as possible and known. Prior to each test the bottom part of the permeation cell is evacuated. During testing the top part is filled with the test gas. The gas permeating the material causes a pressure increases at the bottom part of the permeation cell.

You can detect the gas permeability by evaluating this increase in pressure in relation to time and the device-specific volume. The increase in pressure during the test period is evaluated and displayed by an external computer. The PC is connected to the GDP-C with a serial interface.

You can adjust the sample temperature within the range of -20°C and 80°C using an external thermostat.

The GDP-C software allows you to control the following processes:

  • Setting parameters for different test procedures
  • Viewing a graphical representation of the test procedures
  • Printing charts with the test graph
  • Saving your results in Microsoft Access databases
  • Retrieving and editing graphs and results from previous tests.
  • Saving edited graphs
  • Saving, retrieving and printing special test data (such as pre-conditioning).

Technical Details

GDP-C Specifications
Test method Quantitative determination of the gas permeability of film materials using differential pressure (manometric method)
Test gas All non-corrosive and non-flamable gases
Recommended gas flow 60 bis 100 cm³/min
Measuring Range 0.5 cm³/(m² d bar) bis 30,000 cm³/(m² d bar)
Resolution 0.1 cm³/(m² d bar)
Pressure sensor at the piezoresistive element
permeation cell measuring range 0 hPa to 1000 hPa (2 bar max.)
Tolerance (absolut) < 0.3% of the final pressure (1000 hPa)
Resolution (internal 21 Bit) < 0.05 hPa (with constant test temperature)
Data storage up to 4096 test values (with dynamic time interval selection)
Pressure absorption gauge piezoresistive element (0 hPa to 2000 hPa)
Tolerance < 1% of the final pressure (1000 hPa)
Resolution (display) 0.1 hPa
Data storage up to 512 test values (width dynamic time interval selection)
Sample temperature range -20 °C to 80°C (with external thermostat)
Tolerance ( temperature sensors) +/- 1.5°C
Resolution of the temperature display 0.1°C
Data storage up to 512 test values (with dynamic time interval selection)
Sample temperature range -20°C to 80°C (with external thermostat)
Dimensions 50 x 31 x 74 cm
Weight 20 kg
Storage temperature 0°C - 50°C
Working temperature 20°C - 26°C (to be constant during operation when testing films with a low GTR)
Relative humidity max. 80%, non-condensing
Electrical connection GDPC 230 V / 50 - 60Hz, power consumption ca. 50 W, approx.
Electrical connection PC 230 V / 50 - 60Hz, power consumption ca. 50 W, approx.
Electrical connection monitor 230 V / 50 - 60Hz, power consumption ca. 150 W, approx.
Electrical connection(Thermostat) 230 V / 50 - 60Hz, power consumption ca. 2300 W, approx.
Standard ISO / DIS 15 105 1 ASTM D1434 82 (M)

Download Datasheet

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