Coupling System

Unique, integrated coupling system for unlimited gas analysis

The SKIMMER coupling system with a quadrupole mass spectrometer (QMS) is worldwide the most sensitive system for thermoanalytical gas analysis. The coupling takes place directly in the furnace of the STA 409 CD, which is especially developed for the usage with the SKIMMER coupling. The first pressure reduction stage is arranged directly above the sample container. The orifice is so designed that it works as divergent nozzle. The SKIMMER is the second pressure reduction stage and arranged in the range of the forming compression area behind the nozzle. The distance between sample and high-vacuum component is only ca. 12 mm. As the entire system has sample temperature, condensation during gas transfer is excluded. Due to the vertical gas flow in the sample area and the short distances a complete transfer of the evolving gases is ensured. This again results in short retention times and an extremely high sensitivity.

The STA 409 CD is designed for TGA, simultaneous TGA-DSC or simultaneous TGA-DTA measurements. The TGA sample carriers can be exchanged, in a matter of seconds so that a very powerful and versatile STA is always ready.

Key Technical Data

(subject to change)

STA and QMS features:

  • Temperature range:
    • SiC furnace: RT to 1450°C with SKIMMER orifice from alumina
    • Graphite furnace: RT to 2000°C with SKIMMER orifice from glassy carbon
  • Heating rate:
    Standard furnaces: 0.001 to approx. 100 K/min
  • Weighing range of balance system:
    15000 mg
  • Sensor types:
    DSC, DTA, TG, DSC-cp, quickly exchangeable
  • Extension with glove box
    available (option)
  • Corrosion resistant version
    available (option)
  • Crucibles of various types
    and in in different dimensions
  • Mass range available with QMS:
    • 1 to 512 u (*)
  • Resolution:
    0.5 u (*)
  • Measuring modes / scan rates:
    • Analog scan
    • Scan Bargraph
    • Multi Ion Detection (MID)
  • Detector:
    90° SEV, Detection limit > 10-14 mbar, or > 100 ppb
  • SKIMMER temperature:
    sample temperature
  • SKIMMER material:
    Alumina (1450°C)
    Glassy carbon (2000°C)
  • Ionisation:
    electron impact

u* = unified mass unit


The STA 409 CD-QMS 403/5 SKIMMER system runs in couplings with NETZSCH thermal analysis instruments under Proteus® Software on Windows®. The Proteus® Software includes everything you need to carry out a measurement and evaluate the resulting data. Through the combination of easy-to-understand menus and automated routines, a tool has been created that is extremely user-friendly and, at the same time, allows sophisticated analysis. The Proteus® Software is licensed with the instrument and can of course be installed on other computer systems.

QMS features:

  • Analog scan, scan rates > 0.2 s/u (*)
  • Scan Bargraph, scan Rates > 20 ms/u (*)
  • Multi Ion Detection (MID) up to 64 selectable mass numbers, scan rates > 10 ms/u (*)
  • Characteristic temperatures (Onset, Peak and End)
  • Peak areas for quantitative evaluation and calibration
  • Spectra subtraction

    u* = unified mass unit

You can use the following software with this product:

Proteus® Software, Advanced Software


With the PulseTA® technique an exactly defined quantity of gas is injected to the purge gas of the thermobalance (TGA) or the simultaneous thermal analysis instrument (STA).

function principle of PulseTA®function principle of PulseTA®


Application literature

Application literature
Application literature
Application literature

Binder burnout and sintering behavior of green zirconia material analyzed by different thermoanalytical techniques

published: Ceramic Industry, September (2005) 29

Application literature
Application literature

Quantification of the volatile components of natural glasses and rocks

published: JTAC, Vol 80 (2005) 749




NETZSCH Webinar Evolved Gas Analysis
Unleashing the Power of Thermogravimetric Analysis TGA or STA
NETZSCH-Webinar - Areas of Application for Simultaneous Thermal Analysis with Ceramic Materials


NETZSCH Analyzing and Testing at the Analytica 2016

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