Carbon dioxide concentration sensor

摘要

A carbon dioxide sensor has an arithmetic unit 12 that predicts the minimum value of carbon dioxide concentration that is regulated by the diffusion of the atmosphere by judging that a signal from a carbon dioxide concentration sensing unit 1 indicates a declining tendency and a calibration unit 13 that updates the sensitivity correction factor based on the predicted minimum value. This permits quick calibration by eliminating the need to wait until the carbon dioxide concentration in any given environment reaches the minimum value.