MAX-QMS flange mounted system

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. 

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 


  • 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 


  • 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 


  • 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

Questions? We’re here to help.

Extrel CMS, LLC 
575 Epsilon Drive
Pittsburgh, PA 15238

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