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EVALUATION REPORT SCIENCE APPLICATIONS INTERNATIONAL CORPORATION S-CAD CHEMICAL AGENT DETECTION SYSTEM
Citation:
KOGLIN, E. N. EVALUATION REPORT SCIENCE APPLICATIONS INTERNATIONAL CORPORATION S-CAD CHEMICAL AGENT DETECTION SYSTEM . U.S. Environmental Protection Agency, Washington, DC, EPA/600/R-06/140, 2006.
Impact/Purpose:
evaluation of commercially available technology
Description:
The USEPA's National Homeland Security Research Center (NHSRC)Technology Testing and Evaluation Program (TTEP) is carrying out performance tests on homeland security technologies. Under TTEP, Battelle recently evaluated the performance of the Science Applications International Corporation S-CAD Chemical Agent Detection System in detecting a toxic industrial chemical (TIC) and chemical warfare (CW) agents in indoor air. The S-CAD uses electrochemical cells to detect TICs and both ion mobility spectrometry (IMS) and surface acoustic wave (SAW) methods to detect CW agents. With its data fusion algorithm, it is designed to provide a higher probability of detection with a reduced false alarm rate. The S-CAD gathers and stores data for future analysis, and its modular design allows it to be integrated with nuclear and biological agent detectors and other application-specific sensors. It is designed to operate in 10% to 90% relative humidity (RH). This evaluation addressed detection of chemicals in the vapor phase. The following performance characteristics of the S-CAD were evaluated: response time, recovery time, accuracy of hazard identification, repeatability, response threshold, temperature and humidity effects, interference effects, cold-/hot-start behavior, battery life, and operational characteristics.