TwinSense
 Dual Ion-Molecule Reaction - Mass Spectrometer

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General

The TwinSense is a dual Ion-Molecule Reaction - Mass Spectrometer (IMR-MS) in one analyzer unit.

The TwinSense dual mass spectrometer features a unique combination which has been specifically developed in order to measure pre and post catalyst fast and simultaneously. 

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Functional Diagram

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Typical Applications

  • Development of combustion engines (diesel and gasoline)
  • Fast measurement of non regulated hydrocarbons
  • Ammonia measurements on DeNOx catalysts
  • NOx measurements on diesel engines
  • Alternative fuels
  • Catalysts development
  • Desulphurization strategies




Measureable Compounds with EI-MS (excerpt)

Inorganic Compounds

Substance name Molecular formula
Water H2O
Oxygen O2
Carbon dioxide CO2
Carbon monoxide CO
Hydrogen sulfide H2S
Sulfur dioxide SO2
Sulfur S
Ammonia NH3
Nitrogen monoxide NO
Nitrogen dioxide NO2
Dinitrogen monoxide N2O
Hydrogen chloride HCl

Aromatics

Substance name Molecular formula
Benzene C6H6
Toluene C7H8
Styrene C8H8
Xylene / Ethylbenzene C8H10
Phenol C6H6O
PAH’s

Alkanes

Substance name Molecular formula
Methane CH4
Ethane C2H6
Propane C3H8
Butane C4H10
Pentane C5H12
Hexane C6H14
Heptane C7H16
Octane C8H18
Nonane C9H20
Decane C10H22

Alkynes

Substance name Molecular formula
Acetylene C2H2
Propyne C3H4

Sulfur Compounds

Substance name Molecular formula
Hydrogen sulfide H2S
Carbonyl sulfide COS
Sulfur dioxide SO2
Carbon disulfide CS2
Methyl mercaptane CH3SH
Ethyl mercaptane C2H5SH

Nitrogen Compounds

Substance name Molecular formula
Ammonia NH3
Nitrogen monoxide NO
Nitrogen dioxide NO2
Dinitrogen monoxide N20

Alcohols

Substance name Molecular formula
Methanol CH3OH
Ethanol C2H5OH
Propanol C3H7OH
Butanol C4H9OH

Aldehydes

Substance name Molecular formula
Formaldehyde HCHO
Acetaldehyde CH3CHO
Propionaldehyde C2H5CHO
Hexanal C6H12O
Benzaldehyde C7H6O


Specifications

Technical Data IMR-MS 1 Technical Data IMR-MS 2
Mass range 7 – 519 amu Mass range 7 – 519 amu
Resolution ‹ 1 amu Resolution ‹ 1 amu
Analysis time ›= 1 msec/amu Analysis time ›= 1 msec/amu
Measuring range* 10^5 Measuring range* 10^5
Response time* T90 ‹ 20 msec Response time* T90 ‹ 20 msec
Lower detection limit* 0.4 ppt Lower detection limit* 0.4 ppt
Concentration drift ‹ ± 5 % over 24 h Concentration drift ‹ ± 5 % over 24 h
Reproducibility ‹ ± 3 % Reproducibility ‹ ± 3 %
Accuracy ‹ ± 2 % Accuracy ‹ ± 2 %
Ambient temperature 20 °C - 35 °C Ambient temperature 20 °C - 35 °C
Humidity max. 80 % (non-condensing) Humidity max. 80 % (non-condensing)
Gas consumption 30 – 250 ml/min Gas consumption 30 – 250 ml/min
Gas inlet temperature 50 °C – 190 °C adjustable Gas inlet temperature 50 °C – 190 °C adjustable
Gas inlet pressure 0.75 – 2 bar(a) Gas inlet pressure 0.75 – 2 bar(a)
Power 230 V/50 Hz or 115 V/60 Hz 1,250 W
Dimension (WxHxD) 600 x 1.692 x 700 mm
Weight 208 kg

* depending on the components measured, system setup and the settings

 ** depending on the type of gas inlet System 



Reference Customers (excerpt)

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