Temperature/Humidity and indoor air quality monitor. Digital wall mountable or desktop type. Features include visible and audible CO2 warning alarms, triple display of COs level, temperature and humidity, 8 hour weighted averages and a 15 minute weighted average function. CO2 range 0 - 5,000 ppm. Temperature range -10 to 60 degrees C. Relative humidity range 0 - 85%. Dew point temperature -73.4 to 60 degrees C. Wet bulb temperature - 13.3 to 60 degrees C.