HydrogenSense
 Ion-Molecule Reaction & Electron Impact - Mass Spectrometer

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General

Using hydrogen that contains impurities can cause damaged fuel cells after a short time. To counter this, guidelines for appropriate hydrogen purity have been laid out in International Standards ISO 14687:2019 and SAE J2719, which outlines the maximum allowable impurity levels for compounds like H2O, O2, He, N2, Ar, CO, CO2, TS, THC, HCHO, HCOOH, NH3, HBr, HCl and Cl2.

The HydrogenSense is a combination of an Electron Impact (EI-MS) and an Ion-Molecule Reaction (IMR-MS) mass spectrometer in one analyzer unit for the analysis of all the above impurities in hydrogen for PEM fuel cells.

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Functional Diagram

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Typical Applications

  • Analysis of impurities in hydrogen for PEM fuel cells




Measureable Compounds (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
Argon Ar

Hydrocarbons

Substance name Molecular formula
Methane CH4
Benzene C6H6
Toluene C7H8

Sulfur compounds

Substance name Molecular formula
Hydrogen sulfide H2S
Carbonyl sulfide COS
Carbon disulfide CS2
Mercaptans R-SH

Other compounds

Substance name Molecular formula
Formaldehyde CH2O
Formic acid CH2O2
Ammonia NH3

Halogenated compounds

Substance name Molecular formula
Hydrogen bromide HBr
Hydrogen chloride HCl
Chlorine Cl2
Organic halides R-X


Specifications

Technical Data IMR-MS Technical Data EI-MS
Mass range 7 – 519 amu Mass range 1 – 100 amu
Resolution ‹ 1 amu Resolution ‹ 1 amu
Analysis time ›= 1 msec/amu Analysis time ›= 5 msec/amu
Measuring range* 10^5 Measuring range* 0 – 100 Vol%
Response time* T90 ‹ 20 msec Response time* T90 ‹ 20 msec
Lower detection limit* < 1 ppb Lower detection limit* › 0.01 Vol%


Technical Data IMR-MS & EI-MS Technical Data IMR-MS & EI-MS
Gas consumption* 30 – 3.000 ml/min Gas inlet temperature 50 °C – 190 °C adjustable
Gas inlet pressure 0.75 – 2 bar(a) Humidity max. 80 % (non-condensing)
Reproducibility ‹ ± 3 % Accuracy ‹ ± 2 %
Concentration drift ‹ ± 5 % over 24 h Ambient temperature 20 °C - 35 °C
Dimensions (WxHxD) 600 x 1692 x 700 mm Weight 215 kg
Power 230 V/50 Hz or 115 V/60 Hz 1000 W

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



Reference Customers (excerpt)

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Product flyer