Sensors & Electronics
Chemical Sensors
Fiber Optic Chemical Vapor Sensors (147)
Handheld instrument with sensor module. (Cover open to expose fiber optic probe - quarter shown for size reference.)
Problem: Handheld, low cost instrument required for on-site measurement of iodine vapor at low concentrations (~5 ppm)
Project Activity Scope (from Technical Overview Chart): Mechanisms through Instruments
PNNL Solution:
- Developed selective coating for iodine vapor detection using optical absorption
- Demonstrated 2-wavelength fiber optic probe to provide robust measurement
- Developed battery powered, handheld programmable instrument
- Instrument capable of detecting other vapors using other selective coatings
Capabilities Employed to Meet Client Needs: Optical spectroscopy for chemical analysis; chemically selective coating development; coating application to optical fibers; fiber optic probe design; dual channel light emitting diode optical source design; compact optical system design; electronic circuit design; ruggedized packaging design; microprocessor instrument control and data acquisition system; embedded software development; engineering design documentation; lab testing to establish performance & calibration method.
Selected Links to Related Information:
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Contact: Mary Bliss
