This document summarizes work using a fast-swept Langmuir probe to observe the evolution of plasma parameters during magnetic reconnection experiments on the VINETA.II device. The probe measures electron temperature, density, and potential with 10 microsecond temporal and 1 cm spatial resolution. Profiles reconstructed from a transient plasma generated by electron guns show consistency with the expected magnetic field topology. An localized warmer and denser region is observed, corresponding to a current-carrying sheath. The in-plane electric field points away from this sheath and provides information on electron dynamics relevant to the reconnection rate. Further refinement of the data analysis is underway.