Abstract
A new diffusion colorimetric air monitoring badge for sampling time-weighted average concentrations of formaldehyde is described. This small, lightweight badge can be used for either personal or area monitoring. Laboratory validation and field test data showing that the badge is both precise and accurate within OSHA and NIOSH limits are included. The badge has a sampling range of 2–55 ppm-hrs, which is sufficient to detect workplace concentrations at both TWA and ceiling levels.