The AII Palm CO is a simple, cost-effective carbon monoxide analyzer for checking compressed breathing air tanks used in scuba diving. It features two-button operation and one-touch calibration.

An electrochemical CO sensor measures CO levels in gas streams, producing an electrical current proportional to CO concentration. A battery-powered microprocessor converts the sensor signal to a 1 ppm resolution display. The Palm CO is essential for ensuring safe breathing air quality in dive operations.