The SrFeCo0.5O 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 SrFeCo0.5O 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 (3×102)–(1×105)Pa (300–1000mbar). The maximum oxygen-permeated flux at 1273K is 6.5×10−3 molm−2 s−1. The activation energies for the O2-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.