The SrFeCo 0.5 O y system combines high electronic/ionic conductivity with appreciable oxygen permeability at elevated temperatures. This system has potential use in high-temperature electrochemical applications such as solid oxide fuel cells, batteries, sensors, and oxygen separation membranes. Dense ceramic membranes of SrFeCo 0.5 O y are prepared by pressing a ceramic powder prepared by using a sol–gel combustion technique. Oxygen and hydrogen permeation at high temperature on this material are studied. Measurements are conducted using a time-dependent permeation method at the temperature in the range of 1073–1273K with oxygen- and hydrogen-driving pressures in the range (3×10 2 )–(1×10 5 )Pa (300–1000mbar). The maximum oxygen-permeated flux at 1273K is 6.5×10 −3 molm −2 s −1 . The activation energies for the O 2 -permeation fluxes and diffusivities are 240 and 194kJ/mol, respectively. Due to the high fragility, the high temperature for the measurements and the high oxygen permeation through such material, a special membrane holder, and compression sealing system have been designed and realized for the permeation apparatus.