Carbon Monoxide (CO) USB Data Logger

Product Code: HDT-CO

The HDT-CO is a USB data logger that measures and stores up to 32,510 Carbon Monoxide (CO) readings over a 3 to 1000 ppm measurement range and -10°C to +40°C (+14°F to +104°F) operating temperature range.

Easily configure the data logger by plugging it into a PC's USB port and running the free EasyLog USB software, available for download using the link below. Configuration options include: logger name, logging rate (10s, 30s, 1m, 5m), warning threshold and start date/time. Logged data can be downloaded via the software and then graphed, printed or exported to other applications.

The data logger is supplied complete with a long-life lithium battery. Data is stored in non-volatile memory and is not lost when the battery is empty. A bright red LED will flash and a buzzer can sound when a preset warning level has been exceeded.

Lascar Product Code: EL-USB-CO


The HDT-CO is a professional instrument that is designed to measure and record levels of Carbon Monoxide (CO) in air over a period of time. It takes a sample reading at set intervals for recording / monitoring / analysis purposes. It is not a suitable substitute for a domestic or industrial Carbon Monoxide detector/alarm.

  • Features
  • Technical
  • Documents
  • Software
    • 3 to 1000 ppm CO measurement range
    • Stores up to 32,510 measurements
    • User-programmable warning threshold with bright visual and audible warnings
    • USB interface for set-up and data download
    • Easy setup using free EasyLog USB PC software
    • Expected sensor life: 4 years
    • Replaceable battery supplied
  • Technical Details
    Measurement Range
    3 to 1000 ppm CO *
    Internal Resolution
    0.5 ppm CO Typical
    Accuracy (overall error)
    ±2 ppm Minimum
    ±6% Typical
    ±3% Typical
    Long Term Drift 5% / year Maximum
    Zero Offset
    ±2 ppm CO Typical
    Response Time (to reach 90%) 1 Minute Typical
    Unit of Measurement 
    ppm CO 
    Logging Rate
    Every 10s up to every 5 Minutes
    Operating Temperature Range
    (15-90 %RH, non-condensing)
    -10°C to +40°C (+14°F to +104°F)
    Operating Pressure Range 900 to 1100 mBar
    3.6V ½ AA lithium battery (replaceable)
    Battery Life 3 Months Maximum **
    Dimensions 125mm (L) x 26.4mm (W) x 26.4mm (H)


    * Do not expose to levels above 1000ppm (ie directly measuring the exhaust of a car or wood burner)

    ** With battery supplied, 5 minute logging rate, 25°C ambient temperature, audible warning disabled, reading < 10ppm CO

  • Free EasyLog USB software

    Free EasyLog USB software

    The core of Lascar's USB data logging solution is the free software supplied with each USB data logger. Using a wizard format to guide the user through setup of the data logger and subsequent download of collected data, the software puts the 'easy' into EasyLog.

    Compatible with 32-bit and 64-bit versions of Microsoft Windows 7, 8 and 10

Note: supplied product colour may vary from image shown