The Fluke CO-220 Carbon Monoxide Meter is a portable instrument designed to detect and measure carbon monoxide (CO) levels. It provides a digital reading on the LCD and an audible beeper tone to alert users to the presence of CO. The meter is suitable for use in various environments, including homes, workplaces, and industrial settings, to ensure safety and compliance with OSHA standards. It features a self-test function, Max/Hold mode for capturing peak readings, and automatic power-off to conserve battery life.