COTK-114 Carbon Dioxide CO2 Meter Data Logger Temperature Humidity Monitor 9999ppm

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This 3-in-1 CO2 datalogger & monitor is designed for fast & accurate measurement & logging of CO2 level, air temperature, and humidity. An ideal instrument for indoor air quality (IAQ) ...
$172.90 USD
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This 3-in-1 CO2 datalogger & monitor is designed for fast & accurate measurement & logging of CO2 level, air temperature, and humidity. An ideal instrument for indoor air quality (IAQ) diagnosis and HVAC system performance verification.

This logger is
 factory pre-calibrated at standard 400ppm CO2 concentration.
IAQ monitoring and ventilation surveys of CO2 level & air ventilation become widely applied in public areas such as offices, classrooms, factories, hospitals, day care centers, and hotels.


  1. Data logging up to 15,999 points
  2. Data can be saved to memory 
  3. 1-Key touch to activate the logging mode
  4. Real Time clock and Calendar
  5. Warning Carbon Dioxide Level from 1000-5000ppm 
  6. Super large LCD w/ 15° Tilt Angle & large digital readout 
  7. Indoor air quality level indication (Good, Normal, Poor)
  8. Display CO2 value, Air Temp & RH, Year-Month-Date, and Hour-Minute simultaneously
  9. Maximum /Minimum CO2 value recall Function
  10. Selectable °C and °F
  11. Stable NDIR (Non-Dispersive Infrared) for CO2 detection
  12. ABC CO2 Automatic Background Calibration (ABC) and manual CO2 calibration 
  13. Longtime drift compensation
  14. Bright LED visible indicates power is ON 
  15. Audible Alarm on both high limit & low limit (adjustable)
  16. Easy to connect with PC for data download
  17. CE Marking


  • Measuring Range
    • CO2: 0~9999ppm
    • Air Temperature: -10 ~ 60°C (14 ~ 140°F)
    • Air Relative Humidity: 0.1 ~ 99.9%RH
  • Resolution
    • CO2:  1ppm
    • Air Temperature:  0.1°C / 0.1°F
    • Air RH:  0.1%RH
  • Accuracy
    • CO2:  ±50ppm or ±5% of the reading (0~2000ppm); ±10% of the reading (Above 2000ppm)
      • Air Temperature:  ±0.6°C, ±0.9°F
      • Air Relative Humidity:   ±3%RH (at 25°C, 10~90% RH)
        • ±5%RH (at 25°C, <10% & >90% RH)
    • Response
      • CO2:  <2 mins (90% step change)
      • Air Temperature:  <2 mins (90% step change)
      • Air Relative Humidity:  <10 mins (90% step change)
    • Air Quality Level (CO2 Concentration):
      • Good:   <700ppm (programmable by user)
      • Normal:  700 ~ 1000ppm (programmable by user)
      • Poor:   >"Normal"
    • Sample Point:  15999 points (5333points for each parameter)
    • Warm-up Time:   30sec
    • Sampling Rate Interval: 1sec to 4 hour 59 minutes 59 seconds
    • LCD & Green LED Display
    • Alarm:  >1000ppm (programmable by user)
    • LCD size: 60 x 82mm (HxW)
    • Operating Condition: 0~50°C, 5~80%RH (be sure to avoid condensation)
    • Storage Condition: -20~50°C, 5~90%RH (be sure to avoid condensation)
    • Power Supply: 5V DC adaptor (±10%), >=500mA
    • Size: 120 x 80mm (diameter x depth)
    • Weight: 200g

    Set Includes:

    • 1 x CO2 Datalogger 
    • 1 x Universal Adaptor 
    • 1 x USB cable
    • 1 x Software CD
    • English Operation manual
    • Standard Packaging Box 

    Returns Policy

    You may return most new, unopened items within 30 days of delivery for a full refund. We'll also pay the return shipping costs if the return is a result of our error (you received an incorrect or defective item, etc.).

    You should expect to receive your refund in the same payment form used at the time of purchase within four weeks of giving your package to the return shipper. This time period includes the transit time for us to receive your return from the shipper, the time it takes us to process your return once we receive it, and the time it takes for the refund to be credited to your account.

    For more information, please refer to our Return, Refund & Warranty Policy or contact us.

    Shipping Policy

    We can ship to virtually any address in the world. Note that there are restrictions on some products, and some products cannot be shipped to international destinations.

    When you place an order, we will estimate shipping and delivery dates for you based on the availability of your items and the shipping options you choose. Depending on the shipping provider you choose, shipping date estimates may appear on the shipping quotes page.

    Please also note that the shipping rates for many items we sell are weight-based. The weight of any such item can be found on its detail page. To reflect the policies of the shipping companies we use, all weights will be rounded up to the next full pound.

    For more information, please refer to our Shipping Policy.

    Warranty Policy

    Most of our items come with 1 year warranty for manufacturer defects. It does not include damage caused by misuse, accidents, abuse, alterations, neglect or other external causes.

    The warranty will not extend to consumables (i.e. electrodes, calibration solution, battery, index oil), accessories, cable, compact disk and/or any written document bundled with the item.

    For more information, please refer to our Warranty Policy.

    1-Year Warranty
    30-Day Returns
    Secure Shopping
    Customer Support
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