Extech Air Quality Meter (EA80) CO2, Temp, RH, Dew Point & Wet Bulb

Model #: EA80
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Category Air Quality - IAQ

Indoor Air Quality Meter with Internal Datalogger

  • Measures CO2 , Temperature, Humidity, Dew Point, and Wet Bulb
  • Checks for Carbon Dioxide (CO2) concentrations
  • Maintenance free dual wavelength NDIR (non-dispersive infrared) CO2 sensor
  • Continuous (20,000 sets) or Manual (99 sets) data logging


  • Relative Humidity Range: 10 to 95%RH
  • Resolution: 0.1%RH
  • Accuracy:
    • 3%RH at 25C (77F) and 30 to 95% RH
    • 5%RH at 25C (77F) and 10 to 30% RH
  • Sensor type: Precision capacitance sensor
  • Response time:
    • 45 to 95%RH ≤ 1 minute
    • 95 to 45%RH ≤ 3 minutes
  • Temperature Range: -20 to 60C (-4 to 140F)
  • Resolution: 0.1
  • Accuracy: 0.5C, 0.9F
  • Sensor type: Thermistor
  • Response time: approximately 2 seconds at 10C
  • Display: LCD triple display
  • Display Rate: One time per second
  • Low Battery Indication: The '+' is displayed when the battery voltage drops below the operating voltage
  • Power Supply: (6) AAA batteries or Regulated AC adapter
  • Battery Life: Approx. 8 hours by using alkaline batteries (without backlight or Alarm function). If data logging over a long period of time, use an AC adapter.
  • Manual Data Memory Capacity: 99 sets.
  • Auto Data logging Capacity: 20,000 sets (maximum 99 blocks)
  • Operating Temperature Range: 5 to 50C (41 to 122F)
  • Storage Temperature Range: -10 to 60C (-14 to 140F)
  • Operating Humidity Range: 10 to 90%RH
  • Storage Humidity Range: 10 to 90%RH
  • Dimensions: 6.22" x 2.83" x 1.38"
  • Weight: approx 255g (including batteries)

CO2 Specifications:

  • Sensing Range: 0 to 6000ppm
  • Resolution: 1ppm
  • Accuracy: 3% of reading at 101.4 kPa (29.92 inHg) and 25C (77F) or 50ppm, whichever is greater
  • Sensing Method: Dual wavelength detector with non-dispersive infrared (NDIR) sensor
  • Gas Sampling Mode: Diffusion
  • Warm up time: 10 seconds
  • Response time: <10 minutes in still air
  • Temperature Coefficient: Add 0.36% of reading per C (0.2% of reading per F) away from calibration temperature

Supplied with:

  • Instruction Manual
  • (6) AAA batteries
  • AC Adapter
  • Software CD ROM Windows 95/98/NT/2000/ME/XP compatible software
  • RS232 Cable

Download Users Manual (PDF format)

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