Humidity & Temperature USB Data Logger

  • Humidity/Temp USB data logger
  • Configuration software
  • User-selectable alarm thresholds
  • LEDs indicate logger status
  • IP67 protection
  • Calibration certificate available

Product Description


Humidity & Temperature USB Data Logger

This data logger measures and stores up to 16,382 relative humidity and 16,382 temperature readings over 0 to 100%RH and -35 to +80°C (-31 to +176°F) measurement ranges. The user can easily set up the logging rate and start time, and download the stored data by plugging the module straight into a PCs USB port and running the purpose designed software under Windows 2000, XP, Vista and 7. Relative humidity, temperature and dew point (the temperature at which water vapor present in the air begins to condense) data can then be graphed, printed and exported to other applications. 

The data logger is supplied complete with a long-life lithium battery, which can typically allow logging for a year. Status indication is via flashing red and green LEDs. The logger is protected against ingress from water and dust to IP67 standard when the plastic cap and seal are fitted. 

Download the latest version of the configuration and graphing software from Lascar’s website.







Relative Humidity

Measurement range





Repeatability (short term)




Accuracy (overall error)




Internal resolution




Long term stability





Measurement range

-35 (-31)


+80 (+176)

°C (°F)



±0.1 (±0.2)


Accuracy (overall error)


±0.5 (±1)

±2 (±4)

Internal resolution


0.5 (1)


Dew Point

Accuracy (overall error) (25°C, 40-100%RH)


±1.1 (±2)***


°C (°F)

Logging rate

every 10s


every 12hr

Operating temperature range

-35 (-31)


+80 (+176)

°C (°F)

1/2AA 3.6V Lithium Battery Life


1* year



* Depending on sample rate, ambient temperatures and use of alarm LEDs
** This specifies the overall error in the logged readings, for relative humidity measurements between 20 and 80%RH
*** This specifies the overall error in the calculated dew point, for realtive humidity measurements between 40 and 100%RH at 25°C

The EL-USB-2 is suitable for a wide variety of applications, these include:

– Pharmaceutical fridge monitoring
– Environmental and weather monitoring
– Agricultural and livestock
– Food & drink
– Building & site monitoring

Lascar’s calibration certificate is traceable to UKAS standards. Customers in the UK, EU, Rest-of-world will receive UKAS traceable certificates.

A calibration certificate is not supplied as standard with a data logger. It is at extra charge.

Please note that a calibration certificate can only be provided with a data logger at the time of original purchase.

Set up and data download of Lascar’s  EasyLog data loggers is enabled by Lascar’s  EL-WIN-USB software. It is compatible with 32-bit and 64-bit versions of Windows XP, Vista, 7 & 8.

Download the latest version of the software as instructed in guide sheet supplied along with the item. Please note, the software is not compatible with Mac or Linux.


Download brochure.