
General
The PEMSense is an electron impact mass spectrometer (EI-MS) for the fast measurement of H2, N2, O2, H2O and CO2 on PEM fuel cells.
The analyzer is equipeed with a dual sample gas inlet, a low flow inlet (< 60 ml/min) for the anode and a standard flow inlet for the cathode and exhaust.

Functional Diagram

Typical Applications
- Fuel cell testing
- Fuel cell development
Success Stories
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 |
Argon | Ar |
Hydrocarbons
Substance name | Molecular formula |
Methane | CH4 |
Specification
Technical Data | EI-MS | Technical Data | EI-MS |
Mass range | 1 – 100 amu | Ambient temperature | 20°C – 35°C |
Resolution | < 1 amu | Humidity max. | 80% (non-condensing) |
Analysis time | >= 10 msec/amu | Gas consumption cathode | 3000 ml/min |
Measuring range | 100 ppm – 100 Vol% | Gas consumption anode | 3 - 60 ml/min |
Response time cathode | T90 < 100 msec | Gas inlet temperature | 50°C – 180°C adjustable |
Response time anode | T90 < 2 sec @ 4 bar(g) | Gas inlet pressure cathode | 1 – 2 bar(a) |
Lower detection limit | <= 100 ppm | Gas inlet pressure anode | 0.75 – 6 bar(a) |
Concentration drift | <± 5% over 24h | Power | 230V/50Hz or 115V/60Hz 800W |
Reproducibility | <± 3% | Dimensions (W x H x D) | 534 x 743 x 639 mm |
Accuracy | <± 3% | Weigth | 62 kg |