The Contamination Indicator Decontamination Assurance System (CIDAS) is a technology used to identify chemical contamination. CIDAS is meant to help soldiers by detecting trace levels and finding the exact location of chemical weapon agents. 
CIDAS is a component of a larger U.S. government initiative, run by the Joint Project Manager Protection at the Department of Defense, to improve decontamination processes associated with chemical, biological, and non-traditional warfare agents. Programs under this umbrella include the Joint Sensitive Equipment Wipe, General Purpose Decontaminants, and CIDAS.