1. Date of download: 6/28/2016 Copyright © ASME. All rights reserved. From: Design and Validation of a Water Transfer Factor Measurement Apparatus for Proton Exchange Membrane Fuel Cells J. Fuel Cell Sci. Technol. 2009;6(4):041014-041014-13. doi:10.1115/1.3007900 Illustration of the subcell approach to mimic a full-sized PEMFC Figure Legend:

2. Date of download: 6/28/2016 Copyright © ASME. All rights reserved. From: Design and Validation of a Water Transfer Factor Measurement Apparatus for Proton Exchange Membrane Fuel Cells J. Fuel Cell Sci. Technol. 2009;6(4):041014-041014-13. doi:10.1115/1.3007900 Range of expected water transfer accuracy calculated from the sensitivity analysis. The different measurands assumed are indicated by the equation number; the number of subcells was varied to show the trade-off between accuracy and spatial resolution. Figure Legend:

3. Date of download: 6/28/2016 Copyright © ASME. All rights reserved. From: Design and Validation of a Water Transfer Factor Measurement Apparatus for Proton Exchange Membrane Fuel Cells J. Fuel Cell Sci. Technol. 2009;6(4):041014-041014-13. doi:10.1115/1.3007900 Expected accuracy in the water transfer factor calculated from the Monte Carlo virtual experiments; full symbols: full system simulation (see Fig. ) and hollow symbols: simulated fuel cell configuration (see Fig. ) Figure Legend:

4. Date of download: 6/28/2016 Copyright © ASME. All rights reserved. From: Design and Validation of a Water Transfer Factor Measurement Apparatus for Proton Exchange Membrane Fuel Cells J. Fuel Cell Sci. Technol. 2009;6(4):041014-041014-13. doi:10.1115/1.3007900 Configuration used for the concept validation experiments Figure Legend:

5. Date of download: 6/28/2016 Copyright © ASME. All rights reserved. From: Design and Validation of a Water Transfer Factor Measurement Apparatus for Proton Exchange Membrane Fuel Cells J. Fuel Cell Sci. Technol. 2009;6(4):041014-041014-13. doi:10.1115/1.3007900 Influence of the gas composition on the infrared sensor response Figure Legend: