The difference between the intelligent carbon and sulfur analyzer and the infrared carbon and sulfur analyzer is that the detection methods are different. The intelligent carbon and sulfur analyzer is a carbon and sulfur analyzer that detects gas volume, while the infrared carbon and sulfur analyzer relies on infrared light. The method of absorption is in the instrument that performs the detection. Intelligent carbon and sulfur analyzers require reagents, while infrared carbon and sulfur analyzers do not require reagents. The infrared carbon and sulfur analysis of Hefei Demai Testing Instrument Co., Ltd. is very good, with good quality and excellent price.