â·ÃÊͺ¶ÒÁÃÒ¤Ò SD800: CO2/Humidity/Temperature Datalogger Records data on an SD card in Excel® format Monitor air quality in schools, office buildings, greenhouses, hospitals and anywhere that high levels of carbon dioxide are generated SD800: CO2/Humidity/Temperature Datalogger Records data on an SD card in Excel® format Monitor air quality in schools, office buildings, greenhouses, hospitals and anywhere that high levels of carbon dioxide are generated. Features: Checks for Carbon Dioxide (CO2) concentrations Maintenance free dual wavelength NDIR (non-dispersive infrared) CO2 sensor Triple LCD simultaneously displays CO2, Temperature and Relative Humidity Measurement ranges: CO2 - 0 to 4,000ppm; Temperature - 32 to 122°F (0 to 50°C); Humidity - 10 to 90%RH Datalogger stores readings on an SD card in Excel® format for easy transfer to a PC Selectable data sampling rate: 5, 10, 30, 60, 120, 300, 600 seconds or Auto Complete with six AAA batteries, 2G SD memory card, universal AC adaptor, and mounting bracket For complete specs please download the product datasheet (not available for some accessories) Specifications: CO2 0 to 4,000ppm Accuracy ±40ppm (<1000ppm); ±5% rdg (>1000ppm) Resolution 1ppm Temperature 32 to 122°F (0 to 50°C) Accuracy ±1.8°F/0.8°C Resolution 0.1°F/°C Humidity 10 to 90% Accuracy ±4%RH Resolution 0.1% Datalogging 2,000K data using 2G SD memory card Dimensions 5.2 x 3.1 x 1.3" (132 x 80 x 32mm) Weight 9.9oz (282g) Carbon dioxide Meter CO2 Meter Datalogger Extech Humidity SD8000 Temperature ºÑ¹·Ö¡ÍسËÀÙÁÔ ¤ÇÒÁª×é¹ à¤Ã×èͧºÑ¹·Ö¡¢éÍÁÙÅ à¤Ã×èͧÇÑ´ CO2 à¤Ã×èͧÇÑ´¡êÒ«¤ÒÃìºÍ¹ä´ÍÍ¡ä«´ì à¤Ã×èͧÇÑ´¤Ø³ÀÒ¾ÍÒ¡ÒÈ à¤Ã×èͧÇÑ´ÍسËÀÙÁÔ ¤ÇÒÁª×é¹