This study is concerned with the sequence and character of the events that take place after the initial exposure of the surface to the product, that is, the buildup and composition of a conditioning film on the surface. Calculations show that for short transient studies, conditioning film measurements can be made to values as small as 3.0 microns. Utilizing higher heating rates (5 W/cm(2)) and shorter transients allow measurements to 2.0 microns. This type of monitoring system can function as an alarm device to signal when a critical point of biofilm buildup is reached. Maintenance procedures can be initiated at the proper time rather than at arbitrary intervals, thus minimizing down time and ensuring product safety. Conclusions include methods to monitor and control the conditioning film formation and deposit growth for various process industries.