GTT Gas-Transmission-Tester | Brugger Feinmechanik

• The device includes no wear parts, making it exceptionally low-maintenance.
• Includes a highly robust sensor (piezoresistive pressure sensor) and can withstand the sudden ingress of air during a measurement. It is also immune from the oversaturation that can affect electrochemical sensors.
• The measurement principle used means that the requirements for generating a vacuum are relatively low. As the starting pressure level has no impact within a broad range (up to 10 hPa), all that is needed is a simple rotary vane pump.
• Directly measures gas transmission of a wide range of test gases increasing the number of uses for this device. For instance, the properties of the materials being tested can often be measured much faster and more precisely. The device does not require any modifications, let alone any intervention, to be used for different test gases.
• The device comes with a gas-saving mode in which the flow rate of the test gas can be reduced to approximately 1.2 l per hour. For example, the contents of a small 10 l bottle can give 60 days of uninterrupted measurement.
• Several measurement modes enable values including the time lag to be calculated. This is needed in order to determine further physical properties such as the solubility or the diffusion coefficient of the sample.
• The temperature is controlled electrothermally by ultra-precise, energy-efficient Peltier elements during the sampling process. This covers the full temperature range of 15 °C to 45 °C that is conventionally used for measurements. This gives the user numerous options for measuring other material properties, such as the
  activation energy.
• Potential uses for the GTT: humidified test gases (digital sensor located right inside the top sample chamber). This relays continuous measurements of the relative humidity and temperature of the test gas.

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