A Low-Cost System for Measuring ppb-Level NO2

IH Oh

doi:10.2478/cttr-2013-0805

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A Low-Cost System for Measuring ppb-Level NO2

Contributions to Tobacco & Nicotine Research

Volume 21 (2005): Issue 7 (October 2005)

By: IH Oh

Open Access

|Dec 2014

Abstract

A low-cost system to measure low-level nitrogen dioxide (NO₂) in an atmosphere was developed. Its major component included a sensor comprising filter paper treated with 3,3’-dimethylbenzidine (o-tolidine), a compound that reacts with NO₂to generate color proportional to the NO₂contacted. In addition to the system development, its utility was optimized and the characteristics of the sensor were defined. Originally developed to determine the NO₂levels during direct-fired tobacco curing, the system may be used to determine the NO₂levels in other situations.

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