Process control in gins can range from something as simple as a moisture sensor and a single on-line camera system that continuously measures the trash of the cotton and provides the ginner with an immediate estimate of the leaf grade of the cotton to something as complex as a fully computerized process control system that has several camera systems to measure color and trash, multiple moisture sensors to provide the basis for a dryer control system, and automated valves that allow continuous and immediate diversion of the cotton during processing. Cost of these systems could range from as little as $15,000 to an excess of $100,000. Sufficient dollars would be saved to recover the entire cost of the systems during the first year of operation.