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 | Gas consumption cathode | 3000 ml/min |
| Analysis time | >= 10 msec/amu | Gas consumption anode | 3 - 60 ml/min |
| Measuring range | 100 ppm – 100 Vol% | Gas inlet temperature | 50 °C – 180 °C adjustable |
| Response time cathode | T90 < 100 msec | Gas inlet pressure cathode | 1 – 2 bar(a) |
| Response time anode | T90 < 2 sec @ 4 bar(g) | Gas inlet pressure anode | 0.75 – 6 bar(a) |
| Lower detection limit | <= 100 ppm | Power | 230 V/50 Hz or 115 V/60 Hz 800 W |
| Concentration drift | <± 5% over 24h | Dimensions (W x H x D) | 534 x 743 x 639 mm |
| Reproducibility | <± 3% | Weigth | 62 kg |
| Accuracy | <± 3% |