The present study reports on the electrical conductivity of Ba0.5Sr0.5Co0.8Fe0.2O3-delta (BSCF) under compressing loadings at elevated temperatures. A compressive stress of up to 110 MPa was applied at elevated temperatures up to 1073 K. The experimental results clearly demonstrate the piezo-resistive/conductive characteristic of BSCF. The conductivity increases during the compressing loading, whilst it decreases during the unloading. The conductivity is linearly correlated to the applied stress. The average variation in the conductivity with 50 MPa of the stress is smallest (similar to 0.9%) at 293 K, whilsta is relatively higher (1.2-1.5%) at 473-873 K. The variation (1-1.2%) at 1073 K could be also related to a high-temperature creep deformation. The estimated geometric effect is quite small; thus, the increase in the conductivity could mostly be attributed to the piezo-resistive/conductive effect related to the Janice strain. The piezo-resistive/conductive parameters, pi-factor and gauge factor, calculated are 15-26 x 10(-11) Pa-1 and 8-12, respectively, which are higher than those of LSCF. The present result also indicates a possibility to use BSCF as a stress/strain sensor at elevated temperatures. (C) 2014 The Electrochemical Society. All rights reserved.