Products - Quadrupole Mass Spectrometers and Residual Gas Analyzers

MAX-QMS flange mounted system

 The Extrel MAX Systems are UHV-compatible flange mounted quadrupole mass spectrometers. The ionizer, quadrupole mass filter, and detector on a mounting flange are designed for inclusion in your exprimental vacuum chamber. The electronics consist of the rack mountable QCi (Quadrupole Control, integrated) quadrupole mass filter power supply and a Merlin CS (Command System). The Merlin mass spectrometer controller software completes the system. 

The MAX Systems are based on Extrel’s industry-leading mass spectrometer technology centered on our range of RF power supplies, and our 9.5 mm and 19 mm trifilter mass filters. With a broad range of capabilities and available options, as well as Extrel’s ability to provide customer designs, the MAX Systems can be configured for an extensive variety of applications. 

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 Merlin Automation Features

Spectra Scan 

  • 20 separate non-overlapping mass ranges, more available using customer-written Macros 
  • Real-time profile, histogram and chromatograph (TIC) display 
  • Single scan, continuous and external trigger 
  • 12,500 data points per second scanning

Single Ion Monitoring 

  • 29 SIM masses, more available using customer-written Macros 
  • Real-time profile, histogram and chromatograph (TIC) display 
  • Single scan, continuous, external trigger 

MS/MS 

  • Monitor and control combinations of up to 4 separate quadrupoles, hexapoles, or octupoles using optional TQMS module 

System Control Data Manipulation 

  • Averaging and data smoothing 
  • Background subtraction 
  • Trend plotting 
  • Post acquisition centroid 
  • Chromatographic quantitation 
  • Calibration curves



Mass Range: 

  • 1-500 amu 
  • Other mass ranges available upon request 

Stability: 

  • Better than +/- 0.1 amu after thermal equilibrium 
  • Long-term stability +/- 0.01 amu 

Ionization Source: 

  • Electron Impact (EI) ionization

Mass Filter: 

  • Single 19 mm (3/4 inch) or 9.5 mm (3/8 inch)-diameter rod Tri-filter 
  • Quadrupole with RF-only Pre-filter and post-filter or Triple Quadrupole Mass Filter available 

Detection: 

  • Positive and negative ions using electron multiplier with continuous dynode 

Mass Scanning: 

  • Continuous monitoring of up to 20 masses or mass windows. Additional masses or mass ranges can be added using easy-to-wirte Macros. 

Data System: 

  • Merlin Automation data system with Windows 7 or 10 compatibility 

Power Requirements: 

  • 115 Vac, 50/60 Hz, one 10 A circuit
  • Optional 220 VAC version

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