The Fluke CO-220 Carbon Monoxide Meter makes it easy to take quick and accurate measurements of CO levels with a single compact instrument. Featuring the newest generation of electrochemical sensors, the CO-220 responds very quickly to ambient changes in carbon monoxide concentration without the use of a pump. The CO-220 is the perfect instrument for technicians and other professionals who need to measure CO levels within spaces such as industrial environments, commercial buildings, or residential dwellings where accumulation of combustion gases is possible. CO-220 product highlights include: • Rugged case and electronics. • Large LCD displays CO levels from 0 to 1000 ppm. • Bright back-light allows easy screen viewing under dim lighting conditions. • Beeper triggers with increasing frequency as CO levels increase. • MAX Hold function stores and displays the maximum CO level. • Automatic sensor zeroing and self-test sequence upon start-up. • CO level beeper can be silenced if desired. • Automatic power-off after 20 minutes extends battery life. • Easy to replace battery. • Replaceable sensor extends tool life. • C50 soft carrying case, battery and instruction sheet.