GDP-C - Gas Permeability Tester

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).

Download Datasheet

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)
Perssure 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)

Accessories

Required Accessories

Vacuum Pump

Optional Accessories

Laboratory requirements

Mains Connection
Test Gas, 1 to 3 bar connection (such as O2)
Vacuum Connector

Expendables and recommended spares

High-Vacuum Grease
Petroleum Ether (cleaning agent for films and the film support)
Test Gas
Sealing Ring