Chemical sensing via a low SWaP wearable spectrometer

Kingsborough, Richard P.; Wrobel, Alexandra T.; Beck, Devon; Cantley, Lauren; Tysk, Shane; Kunz, Roderick R.

doi:10.1117/12.2558158

Cited by 2 publications

(2 citation statements)

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“…In order to provide the Warfighter with a low-SWaP-C chemical sensor solution, we have explored the use of colorimetry, with the analyte specificity that this technique entails, coupled with a simple electronic reader to provide a wearable chemical sensor, akin to self-reading pH paper. [1][2][3][4] This approach stemmed from recent advances [5][6][7][8][9][10][11] in chemical detection through the use of colorimetric array. Arrays of colorimetric dyes have been able to discriminate between partper-million by volume (ppm v ) levels of several classes of toxic industrial chemicals (TICs) as well as uniquely identifying each of 20 TICs at the ppm v level.…”

Section: Introductionmentioning

confidence: 99%

“…In laboratory testing, we were able to detect the presence of 3 parts-per-billion by volume (ppb v ) of ammonia vapor in under 20 seconds using a simple bromophenol blue colorimetric dye in a polymer carrier adsorbed onto a filter paper substrate. 3 In more extensive laboratory testing, we found that the ultimate performance of this device was limited due to a number of shortcomings. However, the basic principle of a low-SWaP colorimetric sensor was still viable.…”

Section: Introductionmentioning

confidence: 99%

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Low-SWaP-C colorimetric detection of vapor-phase chemical threats

Kingsborough,

Wrobel,

Mulroy

et al. 2023

Chemical, Biological, Radiological, Nuclear, and Explosives (CBRNE) Sensing XXIV

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Colorimetric chemical sensors are some of the simplest and low-cost sensors available today. Advancements in small, chip-based optical readout packages, coupled with low-power electronics and wireless communications modules, have allowed for the development of a hands-free colorimetry-based chemical sensor that effectively acts as self-reading M8 paper that responds to vapor-phase chemical threats. We have designed a prototype that can be worn by the user and operate autonomously to provide individual-level chemical threat early notice. By integrating these sensors into a communications network, opportunities exist to create team-scale mesh chemical sensor networks. These prototypes have been tested against toxic industrial chemical (TIC) vapors in the lab and have undergone surety testing against select chemical agent threats. In an effort to extend the utility of these chemical sensors, we have recently started a new effort to integrate the sensor package into new form factors for new tasks. Examples of these include a throwable ball sensor for proximal remote point sensing (in the field or probing an enclosed space) and an unobtrusive sensor placed around a fixed site to monitor for upwind chemical releases.

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