QSN 750-II
  • Titelbild
  • Titelbild

QSN 750-II

QSN-750_03Our QSN 750-II model is a spark emission spectrometer that can be used as a single- or multi-matrix system thanks to its 750 mm vacuum optics. This results in a broad field of application, which not only covers the entire range of metal producing and processing enterprises, but also includes a large spectrum of options for material testers and testing institutes. Both the integration system and the photomultipliers, which are arranged in accordance with customer specifications, are housed inside the optics and are therefore protected against external influences. The temperature-stabilised optics and the Gated Digital Source (GDS) technology guarantee a high degree of signal reproducibility and thus analytical constancy. The easy-to-reach self-cleaning and patented spark stand and aperture window enable problem-free maintenance by the user. An exhaust filter ensures the consumed argon is purged.


  • multi matrix applications
  • up to 64 PMT element channels
  • GDS III spark genetator
  • vacuum system
  • self-cleaning spark stand
  • suitable for automated systems
  • double electrode system as option
  • automatic electrode cleaning as option
More Infos

In contrast to its GS 1000-II “little brother”, the QSN 750-II can also be used within automated production environments. In such cases, the spectrometer is combined with a sample-preparation device and a sample-handling robot to form a single unit, which naturally also ensures automatic cleaning of the counter-electrode. The analysis results are transferred online to the superordinate computer system using a network connection. In order to guarantee optimum quality control, the spectrometer initiates any necessary control sample readings at certain time intervals, whereby the robot is again responsible for sample handing. With the help of previously defined limiting values, the spectrometer automatically monitors control samples. Key system functions are permanently monitored and if necessary this information is transmitted to other systems.

A large number of analysis programs can arise especially when using multi-matrix systems to perform extensive analytical tasks. For this reason, the matching spectrometer software, OBLFwin, provides numerous individual programming options to perfectly suit user requirements. In addition, the automatic program selection option simplifies assignment of the right analysis program. Depending on the application, the measured values appear on screen approx. 16-30 seconds after the start of the measuring process and can then be printed out, transferred within the network or evaluated later.

Precise instructions on how to operate the QSN 750-II model and use the software are naturally given during installation. The customer only has to ensure availability of a power and an argon supply.

Technical Data


  • spectrometer in Paschen-Runge mounting
  • Rowland circle diameter 750 mm
  • wavelength range 110-770 nm
  • optics and read-out electronics temperature stabilised to ± 0.1°C for excellent long-term stability
  • automatic computer controlled profiling
  • coma corrected slits
  • PMT types selected according to the respective wavelength
  • shock resistance

Vacuum System

  • evacuated light metal chamber
  • maintenance free 2-stage rotary vane pump
  • vacuum pump integrated in cabinet
  • pump duty cycle <5%
  • oil diffusion protection
  • automatic pressure regulation and stabilisation

Spark Generator

  • Gated Digital Source (GDS) with integrated multi-spark system
  • maintenance free
  • spark frequency up to 1 kHz
  • unipolar medium voltage discharge
  • separate parameter for pre-sparking and integration selectable
  • variable excitation parameters & discharge characteristics selectable by software
  • Ignition voltage 20kV

Spark Stand

  • Argon purged spark stand, optimised for low Ar consumption
  • patented self-cleaning
  • open sample stand for easy handling
  • low-wear top plate with 12 mm opening
  • optionally adapters for small parts and wires are available
  • low-wear tungsten electrode
  • pneumatic sample clamp for rapid sample handling
  • automatic electrode cleaning as option
  • About 3 l Argon consumption per measurement
  • easy maintenance


  • stabilised PMT high voltage supply
  • dynamic 16 bit AD conversion for each channel
  • DSP Processor controlled
  • USB interface to spectrometer PC

Dimensions & Weight

  • width 104 cm
  • height 130 cm
  • depth  90 cm
  • weight about 460 kg

Power Supply

  • 230V; 50/60 Hz; 1,5 kVA
  • 500 W in stand-by mode

Environmental Conditions

  • operation temperature 10 – 40 ºC


  • standard computer system
  • MS Windows® 10 operating system with custom specific regional and language settings


  • OBLFwin spectrometer program
  • easy routine operation
  • freely configurable sample IDs
  • automatic repeatability control for measurements
  • automatic averaging
  • warning signal if calibration is exceeded
  • bad sample detection including dynamic measurement control (option)
  • as many analysis programs to customer specifications as required
  • individual analysis parameters for each program
  • multivariate calibration model (incl. line overlaps and matrix effects)
  • easy and simultaneous recalibration of a complete matrix
  • automatic program selection
  • type calibration and type measurement
  • spectrometer control sample measurements
  • average and standard deviation from chosen measurements
  • automatic reminder of regular recalibration
  • grade control by comparison with grade database settings
  • automatic display of of selected grade or material number
  • freely editable grade database
  • printout of certificates
  • analysis database
  • several statistical functions as display of control charts
  • automatic analysis data export
  • system check preceding each analyse
  • System diagnostics module
  • software supported maintenance tasks, for example entrance window cleaning


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