The detection of CH chemiiuminescence is demonstrated as a viable technique to obtain data on the falme sheet topology in turbulent reacting flows. Since the CH chemiluminescence signal originates in the flame zone near the stoichiometric surface, the technique also provides a good visualization of the instantaneous isoconcentration contour corresponding to near stoichiometric mixtures of fuel and air. The technique uses two intensified CCD cameras that are gated to provide images of the instantaneous CH chemiluminescence distribution. Advantages of this technique are that no lasers are needed and that it is straightforward to apply, typically requiring only suitable collection optics and a sufficiently sensitive detector. The primary disadvantage is that it provides a line-of-sight measurement so that, in highly turbulent flows where the flame sheet is significantly convoluted, interpretation of the flame sheet structure is difficult.