A fuel cell membrane test stand was designed and fabricated to evaluate three new solid polymer electrolyte membranes. The test stand allowed for measurement of temperature, pressure, humidity, and oxygen concentration at the reactant-catalyst-electrolyte interface. Characterizations were performed of the membranes and gas diffusion electrodes using optical microscopy, scanning electron microscopy, and atomic force microscopy. Performance testing generated polarization curves and power curves to compare the experimental membranes to Nafion 117. Challenges were encountered with sensors shorting out but were addressed with design modifications.