Abstract: The primary aspect of the Controlled Odor Mimic Permeation System (COMPS) is that it provides a field deployable instant and reproducible source of known amounts of target odors. This technology consists of a permeable polymer container (chosen to suit target odor and release rate required), stored inside a non-permeable package. The design allows for the pre-equilibration of the target odors such that the outer surface of the inner package can saturate with odor during storage. Removal of the inner item then provides an instant and reproducible source of known target vapor flux. We have successfully demonstrated this technology by placing the target odor chemicals within permeable membranes such as low density polyethylene which are then sealed within a non-permeable membranes such as metallized polyester.