Lascar EL-USB-4

  • 4-20mA current loop measurement range
  • Logging rates between 1s and 12hr
  • Store 32,510 readings
  • Connection via two screw terminals
  • USB interface for set-up and data download via PC (not Mac compatible)
  • User-programmable alarm thresholds
  • Status indication via red and green LEDs
  • Supplied with replaceable internal lithium battery and Windows control software



The Lascar EL-USB-4 USB Current Data Logger is a standalone data logger that measures more than 32,000 readings over a 4-20mA d.c. measurement range. The data logger is supplied with a cap featuring a pair of screw terminals and measurement leads terminating in crocodile clips. Easily set up the logger and view downloaded data by plugging the unit into a PC’s USB port and using the free EasyLog software provided. Data can then be graphed, printed and exported to other applications for detailed analysis. Supplied with ½ AA battery and wall mount clip.

The EL-USB-4 is suitable for a wide variety of applications. These include:

  • Industrial


0-40mA d.c. measurement range420mA d.c.
Internal resolution0.05mA d.c.
Accuracy (overall error)±1%
Logging rateevery 1severy 12 hr
Operating temperature range-35 (-31)+80 (+176)°C (°F)
1/2AA 3.6V Lithium Battery Life1*Year
Dimensions98 x 26.8 x 26.8 mm (3.85 x 1.05 x 1.05”)

* depending on ambient temperature, logging rate and use of alarm LED.


The core of Lascar’s data logging solution is the free software supplied with each 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 Windows 7, 8 and 10. (not compatible with Mac or Linux).