A new version of this company’s Ultramat 23 gas analyzer records the concentration of oxygen using a paramagnetic measuring cell. The analyzer combines the measurement of up to three infrared-sensitive gases and the paramagnetic O2 measuring principle in one unit. This new version supplements the previous versions of the analyzer with electrochemical cells, making it possible to reliably measure low oxygen concentrations in the range of less than 0.5%. Typical applications include process controls in the cement and steel industries. When combined with an H2S sensor, the unit can also be used for quality control during the production of biomethane and the feeding of biogas into commercial distribution networks. — Siemens Industry Sector, Industry Automation Div., Nuremberg, Germany