GSA PT 1000

High End Pressure Sorption Measurements


On point

The GSA PT 1000 series is built upon the reliable and established Linseis microbalance design. This ultra-sensitive microbalance comes in two versions, offering precise sensitivity at 0.1 or 1 microgram increments for sample weights of 5 or 25 grams.

We provide a range of environmental chambers suitable for a wide spectrum of operating conditions, spanning from -150°C to an impressive 1800°C. Additionally, these chambers can operate under ultra-high vacuum conditions up to 150 bar.

For enhanced capabilities, you have the option to incorporate a TG-DSC (Thermogravimetry – Differential Scanning Calorimetry) measuring head. This feature enables the simultaneous determination of weight changes and calorimetric reactions within a single test run. Moreover, we offer optional gas and vapor dosing systems as well as residual gas analysis to meet your specific analytical needs.


Model GSA PT 1000**
Temperature & pressure range: RT up to 1100°C and max. 150 bar
RT up to 1400/1800°C and max. 50 bar
Vacuum: 10E-4 mbar
Max. sample mass: 2/15/100g
Resolution: 0.1/0.5/10 µg
DSC resolution: 0.3/0.4/1 µW
DSC sensors: E, K, S, C
DTA sensitivity: undefined
Options: Pressure controlable Gas Mixing System (MFC´s)
Atmosphere: inert, oxid.*, red., vak. 

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All LINSEIS thermo-analytical instruments are designed for PC control, with individual software modules exclusively compatible with Microsoft® Windows® operating systems. Our comprehensive software comprises three core modules: temperature control, data acquisition, and data evaluation. This 32-bit software includes all the essential features necessary for preparing, executing, and evaluating Simultaneous Thermal Analysis (STA) measurements. Thanks to the expertise of our specialists and application experts, LINSEIS has developed user-friendly application software that is both comprehensive and easy to understand.

Key Features of TG (Thermogravimetry):

  • Measurement of mass change in percentage and milligrams.
  • Control of mass loss rate.
  • Evaluation of mass loss data.
  • Assessment of residue mass.

General Features:

  • Programmable software with text editing capabilities.
  • Data security measures to protect against power failures.
  • Safeguards against thermocouple breakage.
  • Easy repetition of measurements with minimal parameter input.
  • Real-time evaluation of ongoing measurements.
  • Comparative analysis of up to 32 curves.
  • Storage and export options for evaluations.
  • Import and export of data in ASCII format.
  • Seamless data export to MS Excel.
  • Support for multi-methods analysis, including DSC, TG, TMA, DIL, and more.
  • Zoom function for detailed analysis.
  • Calculation of first and second derivatives.
  • Programmable gas control for precise experimental conditions.
  • A statistical evaluation package for comprehensive data analysis.
  • Versatile free scaling options for data representation.


Our capabilities encompass a range of advanced analytical techniques:
  1. Gas Sorption Analysis
  2. Sorption Enthalpies (Simultaneous TG/DSC-Sensor)
  3. Density Determination
  4. Gas Storage
  5. Zeolites
  6. Catalysts
  7. In-situ Gas Analysis (FTIR, Raman, ELIF)
  8. Kinetic Analysis
  9. Magnetic Suspension Balance for Corrosive Atmospheres
  10. Adsorption Isotherms (BET Surface Analysis)
  11. Temperature Programmed Desorption (TPD), Temperature Programmed Oxidation 
(TPO), and Temperature Programmed Reduction (TPR) Measurements (-196 to 1800 °C)

Temperature Programmed Desorption (TPD), Temperature Programmed Oxidation (TPO), and Temperature Programmed Reduction (TPR) measurements are vital for characterizing zeolites and their catalytic properties. Zeolite acidity can be accurately assessed through the TPD of a base from the zeolite surface. Linseis’ gravimetric Sorption Analyzers are valuable tools for characterizing TPD, TPO, or TPR profiles.

The figure below illustrates the chemidesorption of ammonia from a zeolite catalyst surface. Weakly bound ammonia molecules are desorbed between 100 and 250 °C, while strongly bound ammonia is desorbed between 260 and 500 °C. Quantitative measurements of the desorbed ammonia allow for the identification and quantification of strong and weak acid sites in the sample.


We also conduct in-situ FTIR measurements during processes such as CO2 gasification of anthracite in a TGA system. This provides valuable insights, with sample temperatures at 1100°C, in pure CO2 atmospheres (gas flow rate: 20 ml/min at 273 K, 0.013 bar) during FTIR measurements. The FTIR measurement lasts 30 seconds, with CO absorption at 4300 cm-1 and CO2 absorption at 4900 cm-1, allowing for real-time analysis of gasification reactions.


GSA Product Brochure (PDF)

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