Discontinuous measurement. The instrument is equipped with a process gas cooler and can have up to 8 measuring points.The components methane (CH4), carbon dioxide (CO2), oxygen (O2) and hydrogen sulfide (H2S) are analyzed in condensate free or wet gas. The gas is aspirated from the measuring points, which can be at a distance of up to 100 m. Two calibration gas inputs allow time-controlled periodic calibrations. The patented μPulse technique leads to an extended lifetime of the H2S sensor.