The use of thermal anemometry to measure gas phase turbulence modification by fine particles is discussed. The bridge voltage signal digitized and spikes produced by particle impingement on the hot-wire probe are replaced by holding the last digital value before each spike. Spikes are detected using a slope threshold technique. This procedure is shown to have negligible effect on the gas flow field assuming that the duration of the spikes is short compared to the time between spikes. Measurements obtained in a gas-liquid, two-dimensional duct flow (Reynolds number - 2500), with oleic acid particles (mean particle diameter = 2 μm) in concentrations of 4 × 10-5 g/cm3, illustrate the technique.