The ToxCO provides a quick and easy method of diagnosing cases of carbon monoxide poisoning. In using this small, hand-held unit paramedics, caregivers, and other professional medical workers are provided with an instant diagnosis and are therefore able to avoid the necessity of performing a time-consuming blood test. The unit also detects and measures the presence of carbon monoxide in the immediate environment, thereby giving added protection to first responders in locations where the gas may be present. The ToxCO, when used as a breath analyzer, is a non-invasive method of carbon monoxide measurement and analysis when used with either conscious or unconscious individuals. When used to test the environment, the ToxCO becomes a means of finding the cause before the cause finds you.