Infrared gas analyzer.

摘要

An infrared gas analyzer using a pyroelectric infrared sensor (1), which comprises a heating unit (11) for heating the infrared sensor (1), a heating sensor for detecting its heating temperature and a temperature sensor (12) for detecting the ambient temperature of the infrared sensor (1), and controls the heating unit (11) so as to retain the ambient temperature of the infrared sensor (1) at constant so that the output error is small irrespective of the change in ambient temperature.