77535 CO2 0-9999ppm Temperature DP WB RH Humidity IAQ Air Quality Meter Tester Monitor carbon dioxide detectors analyzer Dew Point Wet Bulb USB datalogger

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  • $253.56

  • Regular Price $266.90

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This meter measures CO2 level, air temperature, dew point (DP), wet bulb temperature (WB) and Humidity (RH) and is an ideal instrument for indoor air quality(IAQ) diagnosis.

Poor indoor air quality is considered unhealthy because it causes tiredness, loss of ability to concentrate, and even illness (ex. Sick Building Syndrome). IAQ monitoring and survey, especially on CO2 level and air ventilation become widely applied in public areas such as offices, classrooms, factories, hospitals, and hotels.

The portable CO2 meter uses NDIR (non-dispersive infrared) technology to ensure reliability and long term stability. It's useful in verifying HVAC system performance and air ventilation control.

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  • Triple displays of CO2 level, temperature, and Humidity
  • Stable NDIR sensor for CO2 detection
  • Statistics of weighted averages
    • TWA (8 hours weighted average)
    • STEL (15 minutes-weighted average)
  • Backlight for working in dark area
  • Audible CO2 warning alarm
  • Battery and adaptor power supply
  • Easy manual calibration on CO2 and humidity
  • PC connect via RS232 interface (not included in the set)


  • Measuring Range:
    • CO2: 0~9999ppm
      • (5001~9999 out of scale)
    • Temperature: -10~60°C (14~140°F)
    • Humidity: 0.1% ~ 99.9%RH
    • Dew Point: -20.0~59.9°C
    • Wet Bulb : -5.0~59.9°C
  • Resolution: 1ppm,0.1°C/°F, 0.1%RH
  • Accuracy:
    • CO2: ±30ppm ±5% (0~5000ppm)
    • Temperature: ±0.6°C / ±0.9°F
    • Humidity: ±3%RH (at 25°C, 10~90%RH);
      • ±5%RH (at 25°C, others)
  • Warm-up time: 30 seconds
  • Response time
    • CO2: <30 seconds (90% step change)
    • Temp: <2 mins (90% step change)
    • RH: <10 mins (90% step change)
  • LCD Size: 26mm x 44mm
  • Operating Condition: 0~50°C, 0~95%RH (avoid condensation)
  • Storage Condition : -20~50°C, 0~95%RH (avoid condensation)
  • Power Supply: 4x AA batteries
  • Battery life: >24 hours (alkaline batteries)
  • Meter size: 205mm x 70mm x 56mm ( L x W x H)
  • Weight: 200g

Set Includes:

  • 1x Portable CO2 meter
  • 4x AA batteries
  • 1x English Manual
  • Hard Carrying Case

Click here to purchase the CD software with USB cable or contact us at sales@gainexpress.com if you want the item/s included in your purchase.

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