Lascar EL-SIE-1

  • -18°C to +55°C (-0.4 to +131°F) Temperature measurement range
  • User-programmable sample rate and alarm limits
  • 1 Million point storage capacity
  • NEMA 4X rated
  • USB interface for set-up and download via web browser PC and Mac compatible
  • Data can be uploaded to Lascar EasyLog Cloud
  • Powered by 2 AAA batteries – typical battery life of 1 year



Monitor the environment you live and work in with the Lascar EL-SIE-1. Configuration is simple, with no software to install on your PC or Mac – just connect the logger with a USB cable, and use your standard web browser to configure the device for logging. You don’t even need internet access to set up and use the EL-SIE-1, it really couldn’t be easier.

The logging interval can be set between 10 seconds and 24 hours, with immediate, delayed, triggered, or push-to-start logging. Alarms are fully user-configurable, with functionality including cumulative alarms, pre-alarms, a delay before alarm triggering, and an alarm hold option, which continues showing the alarm condition even if the reading returns to an acceptable level.

The display shows current, maximum, and minimum readings, and three colored LEDs indicate device status at a glance.

Once logging is complete, re-connect to your computer and use your browser to view, analyze, and save your data. You can also choose to upload your data to an EasyLog Cloud account, making the data accessible online for powerful graphing, analysis and report generation.

Typical battery life is over 1 year using standard AAA alkaline batteries, and a wall mounting bracket is supplied with the device

The EL-SIE-1+ is available for any higher accuracy temperature needs.

Inside the Box:

  • 2 x AAA 1.5V Alkaline Batteries
  • Mounting Bracket
  • USB A to USB C Cable



Temperature Measurement Range -18 to +55°C (-0.4 to +131°F)
Resolution 0.01°
Accuracy ±0.2°C (±0.36°F) typical
Long Term Stability <0.03°C (<0.054°F) / year
Measurement Units °C, °F or K
Logging Rate 10 seconds to 24 hours, user selectable
Start Modes Immediate, push to start, delayed start, parameter triggered
Memory Capacity Over 1,000,000 total readings
Power Source 2 x AAA 1.5V battery
Battery Life >1 year (at 25°C with 10-minute logging rate)
Dimensions 93 x 42 x 17 mm (excluding bracket)
Operating Temperature Range -18 to +55°C (-0.4 to +131°F)
Environmental Rating IP4X


No Software to Install!

All the software needed to configure your EL-SIE-1, and view and analyze the data it logs, is contained within the product itself. Just connect the logger to your PC or Mac with a USB cable, open any web browser and in the address bar type “http://EasyLog.local”. No internet connection is needed, and you can save this address in your bookmarks or favorites as normal.

The interface is easy to use and allows the following parameters to be configured:
• Logger and channel names
• Measurement units
• Logging rate and start mode
• Up to 16 separate alarms (high/low/pre-alarm/cumulative) with thresholds, delay and hold
• Display and LED indicator modes

Once the logger is running, you can plug it back into your computer and see the latest data, device status, and event log. You can also choose to stop the logger and change the configuration, or just let it continue logging.


EasyLog Cloud Data Storage

Store your data securely, and make it available from any internet-connected PC or mobile device, with EasyLog Cloud. The EL-SIE-1 can upload logged data to the Cloud from your PC or Mac, making sharing and analysis easier than ever. For more information
and to set up an account on EasyLog Cloud, visit




Calibration Certificates Available

Lascar offers a Traceable Calibration Certificate Service on Temperature Data Loggers. Using reference equipment which has been calibrated by a UKAS/NIST/CNAS accredited laboratory and using apparatus traceable to national or international standards. For more information please call us at 1-800-956-4437



EL-SIE Quick Start Guide (PDF)


All EasyLog Software can be download from Lascar’s website here.

  • USB software, compatible with 32-bit and 64-bit versions of Windows 7, 8, and 10.


EL-SIE Tutorial Videos



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