... imports of infrared detector, O2and NOX sensor, vibration resistance, good stability, high precision;The measurement of CO, HC, CO2for O2, ... ×10-6(ppm)vol (absolute error)or±4% (relative error)Stability:Automatic zero, volume moments drift ≤ ± 3%Repeatability:Repeat error ... preheating 3min urgent examination)Output Mode:Can display can be printed gas concentrations in the maximum,average, minimum and ...