Designed for analysis of gases, vapours and VOCs in liquids

The Hiden HPR-40 DSA Membrane Inlet Mass Spectrometer (MIMS) is a compact bench-top gas analysis system for real-time quantitative analysis and monitoring of dissolved/evolved gases.

The HPR-40 DSA is available with a range of ‘DEMS’ cells for differential electrochemical mass spectrometry. DEMS cells include a nano porous  membrane interface for fast response in-situ determination of gaseous  and volatile electrochemical reactants, reaction intermediates and products in real time.



The system offers the facility for analysis to sub-ppb (parts per billion) levels and is suited to gas analysis applications where sample volume is small and for environmental applications where detection of a low concentration level is required. Both dissolved species probe inlets and circular membrane carrier inlets are available to address a broad range of applications. The inlet probe uses a special membrane that allows small levels of the dissolved species to pass through it and into the ion source of a high precision quadrupole mass spectrometer.

A manual isolation valve allows for control of the sampling and a solenoid safety valve provides protection for the mass spectrometer and vacuum system in case of membrane failure.


  • Analysis of dissolved species with mass range 200 amu (300 amu option)
  • Sub parts per billion detection levels
  • High precision and stability species ratio measurements (e.g. marine de-nitrification studies)
  • Soil core analysis
  • Fermentation process analysis
  • Water analysis in estuary, river or reservoir
  • Groundwater contamination studies
  • Methane production control
  • Microbiological/enzyme activity studies
  • Environmental monitoring






The system is supplied with MASsoft Professional Edition software.

This Windows 8 and Windows 10 compatible software allows control of the instrument via USB 2.0, RS232 or Ethernet. Provides comprehensive I/O for data output and for reading data from external devices for integration and display with mass spectrometer data.



Palmer Station, Antarctica | Gas Analysis

Research using the Hiden HPR-40 DSA to examine the seasonal cycle of biologically produced gases in surface waters of the West Antarctic Peninsula region.

UIC University of Illinois at Chicago | DEMS

Researchers prove surprising chemistry inside a potential breakthrough battery

Critex | Dissolved Gas Analysis

In-situ measurements in groundwater and surface water

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