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)

Permanent Gases

Substance name Molecular formula
Hydrogen H2
Oxygen O2
Nitrogen N2

Moisture

Substance name Molecular formula
Water H2O

Rare Gases

Substance name Molecular formula
Helium He
Neon Ne
Argon Ar
Krypton Kr
Xenon Xe

Hydrocarbons

Substance name Molecular formula
Methane CH4
Benzene C6H6
Toluene C7H8


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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Product flyer