Fast response and good long-term stability. <0-99%RH. 2.4-inch 320X240 high-definition color screen display, 5-button operation. Standard 100,000 data capacity, support real-time viewing, deletion or data export of the machine. Application occasions: Petroleum, medicine, environmental protection flue gas analysis, pipeline, boiler gas analysis, air treatment and other occasions where gas concentration needs to be detected.