Hand-Held Reader for Colorimetric Sensor Arrays

Jon R. Askim, Kenneth S. Suslick

Research output: Contribution to journalArticle


An inexpensive hand-held device for analysis of colorimetric sensor arrays (CSAs) has been developed. The device makes use of a contact image sensor (CIS), technology commonly used in business card scanners, to rapidly collect low-noise colorimetric data for chemical sensing. The lack of moving parts and insensitivity to vibration allow for lower noise and improved scan rates compared to other digital imaging techniques (e.g., digital cameras, flatbed scanners); signal-to-noise ratios are a factor of 3-10 higher than currently used methods, and scan rates are up to 250 times faster without compromising sensitivity. The device is capable of real-time chemical analysis at scan rates up to 48 Hz. (Figure Presented).

Original languageEnglish (US)
Pages (from-to)7810-7816
Number of pages7
JournalAnalytical chemistry
Issue number15
StatePublished - Aug 4 2015


ASJC Scopus subject areas

  • Analytical Chemistry

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