UNI T Carbon Monoxide Meter UT337A is suitable for use everywhere from in the house to restaurants, offices and industrial areas. The UT-337A CO meter measures the exact value of carbon monoxide (CO) gas present in the air. Featuring a built-in sensor integrated into the top of the unit, the UT337A portable carbon monoxide meter measures CO content from 0-1000ppm with an accuracy of ±5% (5ppm) and resolution of 1ppm. The carbon monoxide 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 carbon monoxide tester will alert the user by using a combination of audible and LED light indicators. Features: High sensitivity sensor adjusts regularly to changes in air conditions Measures levels of carbon monoxide (CO) from 0 to 1000ppm Calculates air temperature measurements Self-check function ensures correct operation The battery-powered instrument for use on the move 20-minute auto power-off function User-configurable LED and audible alarms Backlit LCD screen for use in poor lighting conditions Low battery indicator Specifications: CO Measure Range: 0~1000ppm Accuracy: ±5% or 5ppm Resolution: 1ppm Response Time: <60s (90% of reading) Sensor Type: Electrochemical Gas Sensor (CO) Sampling Method: Diffusion Power: AAA 1.5V x 4 LCD Size: 26.5mm × 35.5mm Product Color: Red and Grey Product Net Weight: 140g Product Size: 197mm × 54.8mm × 33.8mm Package Includes: 1 x Carbon Monoxide Meter (UT337A) 1 x User Manual