A Compact, Low-Cost, Near-UV Sensor for Chlorine DioxideEPA Contract Number: EPD06057
Title: A Compact, Low-Cost, Near-UV Sensor for Chlorine Dioxide
Investigators: Bomse, David S.
Small Business: Southwest Sciences, Inc.
EPA Contact: Manager, SBIR Program
Project Period: March 1, 2006 through August 31, 2006
Project Amount: $70,000
RFA: Small Business Innovation Research (SBIR) - Phase I (2006) RFA Text | Recipients Lists
Research Category: Hazardous Waste/Remediation , SBIR - Homeland Security , Small Business Innovation Research (SBIR)
Southwest Sciences proposes the development of an optical, near-ultraviolet chlorine dioxide (ClO2) sensor having a measurement range of about 0.01 to 2000 ppm with a response time of less than 10 seconds. The sensor will be compact—about the size of a 1-quart milk carton including electronic and optics, operate at low power, and be outfitted with a wireless communications interface to permit remote, unattended operation. Intrinsically safe design is possible. The proposed measurement method is linear, free of hysteresis, and free of interference from common atmospheric gases as well as urban and industrial pollutants. The sensors will operate well at high humidity and will be able to tolerate moisture condensation. Analyzers will retain calibration for extended periods (many months).
Commercial applications include real-time sensors for monitoring and controlling ClO2 decontamination of buildings and other enclosed spaces and for monitoring ClO2 water purification processes and facilities. In Phase II, Southwest Sciences will try to extend the diode-laser method to chlorine detection, which will provide extra utility for characterization and for monitoring combined ClO2/Cl2 decontamination and purifications processes. Southwest Sciences also plans to participate in the U.S. Environmental Protection Agency Environmental Technology Verification (ETV) Program to establish performance specifications for the prototype analyzer.