800046 à¤Ã×èͧÇÑ´¡êÒ«¤ÒÃìºÍ¹ä´ÍÍ¡ä«´ì Carbon Dioxide Indoor Air Sper Indoor Air Quality Monitor Poor air quality Poor air quality may cause tiredness, inability to concentrate, and even illness (ie Sick Building Syndrome). This instrument is ideal for monitoring indoor air quality in crowded public spaces with potentially high levels of CO2 (carbon dioxide) such as offices, factories, classrooms, hospitals and hotels. The same measurement parameters can also be used to test air from HVAC equipment. Backlit simultaneous display of CO2 level, humidly and air temperature or the user may choose a rotating display of dew point and wet bulb temperature instead of air temperature. Features Carbon dioxide Humidity Dew Point Air Temperature Wet Bulb Temperature This unit also calculates TWA(time weighted average) and STEL (short term exposure limit). Simple user calibration of CO2 and RH. It features audible CO2 threshold alarms, min/max/ave, hold and an RS232 computer interface. The NDIR technology ensures long term accuracy, stability and reliability. Each unit includes a hard carrying case with 4AA batteries. Specifications Carbon Dioxide Sensor Measuring Range 0 to 5,000 ppm Resolution 1 ppm Accuracy ±30 ppm, ± 5% of reading Relative Humidity Sensor Measuring Range 0 to 100% RH Resolution 0.1 Accuracy at +25°C ±3% (10-90%) ±5% otherwise Temperature Sensor Measuring Range -10 - 60°C 14-140°F Resolution 0.1 Accuracy 0.6°C 0.9°F Dew Point Measuring Range -13.3-60°C 8-140°F Resolution 0.1 Wet Bulb Measuring Range -73.4 - 60°C -100 - 140°F Resolution 0.1 800046 à¤Ã×èͧÇÑ´¡êÒ«¤ÒÃìºÍ¹ä´ÍÍ¡ä«´ì Carbon Dioxide Indoor Air Sper Indoor Air Quality Monitor Poor air quality may