Indoor Air Quality (IAQ) Carbon Dioxide (CO2) Monitor with Alarm and Calendar Made in Taiwan ****           This CO2 monitor will measure CO2 concentration, air (ambient) temperature and relative humidity with visible and audible alarms. Its an ideal instrument for indoor air quality (IAQ) diagnosis and HVAC system performance verification. Carbon Dioxide (CO2) is a gaseous component of the earth's atmosphere. The concentration of CO2 in natural ambient air is about 0.04% or 400ppm. With each breath, human convert oxygen (O2) into carbon dioxide (CO2). Although carbon dioxide is invisible and odorless, an increase CO2-content is apparent because human will noticed increased in fatigue and reduced concentration. It complies with all essential health and safety requirements set out in European Directives (CE marking). Plus, all parts are made and manufactured in Taiwan.   Special Features Super large LCD Simultaneous display of CO2 level, Temperature, Relative Humidity, Calendar (Y/M/D) and Time (clock) Six (6) smiley icons indicating indoor air quality levels (350/450/700/1000/2500/5000ppm) to easily know CO2 concentration Stable NDIR sensor for CO2 detection Selectable High Alarm threshold Selectable °F and °C temperature unit Automatic Baseline Calibration (ABC) function Audible warning for high CO2 concentration Dew Point / Wet Bulb Temperature measurement With functions like: MIN/MAX (Maximum & Minimum reading) WBGT (Wet Bulb Global Temperature - great index for checking heat stress) With CE marking, meets Europe's safety, health and environmental requirements Made with durable & reliable materials. Made in Taiwan Specifications CO2 Range: 0~9999ppm Accuracy: ±50ppm +5% of rdg (CO2) 0~2000ppm others out of scale range Resolution: 1ppm Temperature Range: -10~60°C (14~140°F) Voltage: Input: 100-240VAC, 50~60Hz Output: DC 7.5~9.0V Output current: 0.5A Power Supply: AC 9V / 0.5A Power adaptor   Set Includes 1 x IAQ CO2 Monitor 1 x AC Power Adaptor (choose 1 in the available adaptors: US / UK / AU / EU) 1 x Operation Manual 1 x Standard Packaging Box with Colored Sleeve     Copyright © 2008. All rights reserved. Discount Instrument *