Temperature/Humidity/Dew Point USB Data Logger with LCD

Product Code: HDT-300

Measure and store up to 16,382 temperature and 16,382 relative humidity readings over -35°C to +80°C (-31°F to +176°F) and 0 to 100%RH measurement ranges.

The high contrast 2½ digit LCD can show a variety of temperature and humidity information at the touch of a button: cycle between the current, maximum and minimum stored values for temperature and humidity.

The HDT-300 data logger is supplied with a long-life replaceable lithium battery which can typically allow logging for 1 year (depending on logging rate, ambient temperature and use of alarm LEDs). Status is indicated by flashing red and green LEDs.

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, measurement unit (°C or °F), logging rate, high/low humidity and temperature alarm levels, immediate, delayed and push-to-start logging, display parameters, data rollover options and start date/time. Logged data (relative humidity, temperature and dew point) can be downloaded via the software and then graphed, printed or exported to other applications.

The unit is protected against moisture to IP67 standard when the supplied protective cap is fitted.

Lascar Product Code: EL-USB-2-LCD

  • Features
  • Technical
  • Documents
  • Software
    • -35°C to +80°C (-31°F to + 176°F) temperature range
    • 0 to 100%RH relative humidity range
    • Easy setup using free EasyLog USB PC software
    • Dew point indication via control software
    • Programmable alarm thresholds for %RH & Temperature
    • Status indication via red and green LEDs
    • High contrast LCD, with two and a half digit temperature and humidity display function
    • Immediate, delayed and push-to-start logging
    • Replaceable battery supplied
    • Link to free configuration software supplied
    • Environmental protection to IP67 (when cap fitted)
    • Separate wall clip
  • Technical Details
    Temperature Measurement Range
    -35°C to +80°C (-31°F to +176°F)
    Internal Resolution
    0.5°C (1°F)
    Accuracy (overall error)
    ±0.55°C (±1.04°F) typical (5 to 60°C)
    Long Term Stability
    < 0.02°C (0.04°F) / year
    Relative Humidity Measurement Range 0 to 100%RH
    Internal Resolution 0.5%RH
    Accuracy (overall error)
    ±2.25%RH typical (20 to 80%RH)
    Long Term Stability < 0.25%RH / year
    Dew Point
    Accuracy (overall error)
    ±1.7°C typical (-35 to 80°C, 40 to 100%RH)
    Unit of Measurement  °C, °F, %RH (°C also for dew point)
    Logging Rate User selectable between 10 seconds and 12 hours
    Operating Temperature Range
    -35°C to +80°C (-31°F to +176°F)
    16,382 temperature; 16,382 relative humidity
    3.6V ½ AA lithium battery (replaceable)
    Dimensions 126mm x 25mm x 22mm


  • 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