Hygronom is also known as humidity or dew point analyzer for measuring pollutant emission flue gas humidity whereby wet gas concentration being converted to dry gas concentration, also used for industrial on-line moisture monitoring. H-100 hygronom has built-in high precision capacitive type digital temperature and humidity sensor. It is probe rod type independent installation style at present. The sensor is in contact with flue gas in the chimney, while probe should be heated in order to prevent condensation influence to the moisture measurement of flue gas. After flue gas contacting with measurement chip, chip changes capacitance value, thus obtains flue gas concentration.