General. Introduction / Wolfram Oelßner -- Carbon Dioxide in General / Detlev Möller, Manfred Decker, Jens Zosel, Wolfram Oelßner -- Principles of Carbon Dioxide Sensors andMeasuring Methods. Analytical Methods for the Detection of Gaseous CO2 / Gerald Gerlach, Armin Lambrecht, Wolfram Oelßner -- Electrochemical CO2 Sensors with Liquid or Pasty Electrolyte / Manfred Decker, Wolfram Oelßner, Jens Zosel -- Potentiometric CO2 Sensors with Solid Electrolyte / Hans Ulrich Guth -- Opto-Chemical CO2 Sensors / Gerald Gerlach, Wolfram Oelßner -- Non-dispersive Infrared Sensors / Gerald Gerlach -- Photoacoustic Detection of CO2 / Frank Kühnemann -- Acoustic CO2 Sensors / Gerald Gerlach -- Miscellaneous Approaches / Wolfram Oelßner, Manfred Decker, Gerald Gerlach -- Survey and Comparison of Methods / Hans Ulrich Guth, Gerald Gerlach, Wolfram Oelßner -- Applications. Environmental CO2 Monitoring / Detlev Möller, Wolfram Oelßner -- CO2 Safety Control / Wolfram Oelßner -- CO2 Measurement in Biotechnology and Industrial Processes / Wolfram Oelßner, Jens Zosel -- CO2 Measurements in Biology / Wolfram Oelßner -- CO2 Sensing in Medicine / Gerald Urban, Josef Guttmann, Jochen Kieninger, Andreas Weltin, Jürgen Wöllenstein, Jens Zosel.