Grantee Research Project Results
Final Report: Wireless Electrochemical ClO2 Monitor for Decontamination Operations
EPA Contract Number: EPD07029Title: Wireless Electrochemical ClO2 Monitor for Decontamination Operations
Investigators: Weber, Andrew
Small Business: Giner Inc.
EPA Contact: Richards, April
Phase: I
Project Period: March 1, 2007 through August 31, 2007
Project Amount: $70,000
RFA: Small Business Innovation Research (SBIR) - Phase I (2007) RFA Text | Recipients Lists
Research Category: SBIR - Homeland Security , Small Business Innovation Research (SBIR)
Summary/Accomplishments (Outputs/Outcomes):
The following Phase I developmental work was successfully demonstrated:
- Feasibility of a small (1.1” x 1.1”) screen-printed electrode substrate for the detection of ClO2 in air mixtures utilizing solid-polymer electrolyte-based thick-film sensor technology.
- Feasibility of a miniature (1.25” x 1.25” x 0.25”) potentiostat to control the potential of the sensing electrode relative to a Pt/air reference electrode.
- Feasibility of configuring, in a small (2.0” x 2.0” x 2.5”) package, the sensor cell module composed of the screen-printed, thick-film electrode substrate and its associated components (liquid reservoir and gas access ports) and the electronics module compo sed of the miniature (1.25” x 1.25” x 0.25”) low-power and low-noise potentiostat, the sensor control circuitry, and a transfer board to accept the wireless data transfer device (Crossbow, micro-RF device) for wireless transmission of sensor data to a central location, such as a personal computer or a laptop.
- Feasibility of detection of ClO2 in the range of 0 to 3000 ppm with a detection limit of 2 ppb.
- Feasibility of sensor operation and ClO2 detection with no interference from chemical compounds, such as ethylene (10 ppm), carbon monoxide (50 ppm), carbon dioxide (100 ppm), and nitrogen dioxide (6 ppm).
- Feasibility of sensor operation and ClO2 detection in the temperature and relative humidity (R.H.) range of +1°C to +40°C and 5 to 95 percent R.H., respectively, with minimal effect on the performance of the sensor.
- Demonstration of successful operation of the prototype sensor with wireless data transmission.
Conclusions:
The experimental results of the Phase I developmental work, presented in the Phase I Final Report, showed that the performance of the developed prototype sensor met and exceeded the requirements of a feasibility demonstration and could be the basis for a robust, wireless ClO2 monitoring system, which Giner will fabricate in Phase II. The Phase II design and developmental work will include tasks, such as sensor design improvements and optimization, extensive parametric testing, comprehensive lifetime testing, and fabrication of rugged prototypes for field evaluation.
Potential Applications
Extensive investigation1 of the potential markets for the proposed ClO2 monitor concluded that in addition to the building decontamination and monitoring applications, a rugged and inexpensive ClO2 monitor could find applications in the pulp and paper and fruit and vegetable industries.
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1The investigation of the potential markets was conducted in collaboration with Foresight Science and Technology (Providence, RI), which was contracted by EPA to develop a comprehensive commercialization plan to be submitted with the Phase II application.
Supplemental Keywords:
small business, SBIR, chlorine dioxide monitor, electrochemical ClO2 monitor for decontamination operations, ClO2 monitor for building decontamination,, RFA, Scientific Discipline, Sustainable Industry/Business, Sustainable Environment, Technology for Sustainable Environment, Environmental Monitoring, environmental technology, homeland security, building decontamination, air pollutants, environmental hazard assessment, chlorine dioxide monitoring, bioterrorismSBIR Phase II:
Wireless Electrochemical ClO2 Monitor for Decontamination Operations | Final ReportThe perspectives, information and conclusions conveyed in research project abstracts, progress reports, final reports, journal abstracts and journal publications convey the viewpoints of the principal investigator and may not represent the views and policies of ORD and EPA. Conclusions drawn by the principal investigators have not been reviewed by the Agency.