Previously, the Swager group reported mechanical abrasive deposition of gas sensors across gold electrodes. Now, as reported in Lab on a Chip, the entire circuit can be deposited by abrasion, using drawn graphite electrodes. In addition, the abrasive deposition has been demonstrated for a variety of organic and inorganic surfaces. The SWCNT-based chemiresistive components are able to detect and discriminate ppm amounts of nitrogenous vapors.