Extech CO240 Indoor Air Quality CO2 Meter Handheld Tester

• Extech CO240 Indoor Air Quality CO2 Meter Handheld Tester
• Displays CO2 with Relative Humidity, Temperature, Dew Point, or Wet Bulb
• NDIR (non-dispersive infrared) CO2 sensor is maintenance free 
• Warning alarm for CO2 concentrations that exceed user set point 
• Min/Max for CO2
• Function for Automatic Baseline Calibration 
• Auto-off and Data hold
• Indicator for low battery
• Extech CO240 includes:
• Six AAA batteries, USB cable, PC software, and soft case, software and cable for
  on-line (real-time) datalogging to a PC 

Proposition 65 Warning for California Residents: This product can expose you to chemicals including Benzene, which is known to the State of California to cause cancer and birth defects or other reproductive harm. For more information go to www.P65Warnings.ca.gov.