Suitable for use everywhere from in the house to restaurants, offices and industrial areas, the UT337A measures the exact value of carbon monoxide (CO) present in the air. Featuring a built-in sensor integrated into the top of the unit, the UT337A measures CO content from 0-1000ppm with accuracy of ±5% (5ppm) and resolution of 1ppm. The sensor is also designed to adjust rapidly to changes, ensuring you always get a stable, accurate reading. When CO levels exceed a certain threshold, the UT337A will alert the user by using a combination of audible and LED light indicators. The alarm is configurable to the user’s specification and it is also possible to use this meter to calculate temperature values.