Temperature/Humidity/Dew Point USB Data Logger with LCD
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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. Supplied with battery and link to free PC software for configuration/analysis.

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
- -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 2½ 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
Product Extra Information | Specification
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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 Windows 10 and 11