Abstract: The combination of broadband CARS thermometry on nitrogen with the narrowband technique, for detection of a second major species, is applied to counterflow laminar propane-air diffusion dames. Temperature profiles are measured for various conditions of strain and equivalence ratio. Comparisons with 1D calculations of the flow with a detailed kinetic mechanism are satisfactory. Some measurements of CO concentrations are performed. Feasability of temperature measurements when the propane is replaced by liquid fuel (heptane) is demonstrated.