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The Perfect Temperature Record Keeping Device for Vaccine Storage or Transport.

Memory: 8k
Temperature Range: -40°C to +72°C / -40°F to +161°F

CALL 800-858-6872


Download Product Brief:
Download a PDF of the Reading the Edl-Jr Quick Start Guide


The edl-jr multi-use temperature data logger is the work horse of our product line with a full 8k memory and the ability to measure down to -40C.  It is perfect for monitoring temperatures down to -40C (-40F) without a probe. It has thermistor technology and a basic palm-sized design so it’s perfect where space limitations exist. A favorite in the pharmaceutical and transportation industries.

Functions include: start, stop, elapsed time as well as customizable time intervals. Also available: user descriptions for initialization and for downloading the data; high and low alarm values, recording status, real time measurement display and more. View up to sixteen temperature profiles at a time, download data without stopping the original program, and attach probes or an audio alarm.

Visual Alarms: All our data loggers have the ability to program alarm limits. Should the temperature reach levels outside these limits, the on-board red LED will light until reset by the user.

Computer Ready: Marathon’s easy-to-use MDAS-Pro software is available for Microsoft Windows XP, Vista & 7, 8 and 10. Our proprietary IC-9P serial cable is needed to download temperature information to a computer. MDAS software and cables are sold separately.

edl-jr – SKU #8022
Memory EEPROM, Storage 8k (approx. 8,000 data points)
Temperature Sensor Precision Thermistor
Operating Range -40°C to +72°C / -40°F to +161°F
Accuracy (NIST traceable) ±0.2°C at 0° to 20°C / ±0.5°C at extremes
0.4°F at 32° to 68°F / 0.9°F at extremes
Temperature Resolution 0.2°C / 0.5°F
Measurement Intervals Programmable from 2 seconds per reading. See Duration Chart for examples.
High and Low Alarm Limits LED indicator alarm set by temperature and time.
Indicators Power and Alarm
Internal Clock Accuracy Better than 2 minutes per month
Computer Interface Serial Port RS232 Cable, USB Converter
Power Source One 3.6 Volt Lithium Battery. 12 month shelf life.
Call for Battery Replacement price.
Size 9 cm(l) x 5 cm(w) x 1.6 cm (h)
3.4 in.(l) x 1.97 in (w) x 0.63 in.(h)
Weight 52.5 grams / 1.85 oz.
CE Certified  Yes
(Not 21CFR Part 11 compliant. Click here for 21CFR Part 11 Compliant Software)
Software Highlights: Report Summary & Statistics  •File Manager  •Note Attachment  •Zoom  •Elapsed Time view or Date/Time Recorded view
•Celsius, Fahrenheit or Kelvin display  •3D view option
Warranty 12 months
Required Accessories: MDAS-PRO
IC-9P Cable
NIST Certificate = no charge
Optional Accessories: NIST Certificate + 1, 2 or 3 Point Calibration Available
Optional probes available for ambient or liquid measurement. Call for info.

Specifications subject to change without prior notice.

MDAS-Pro Software

Centralized Monitoring:

Our MDAS-Pro software is the ideal solution for managing and analyzing data from multiple data loggers from multiple locations. With IP Address access MDAS-Pro is location independent so data loggers located anywhere can be centrally monitored and managed.

Marathon’s Data Analysis Software (MDAS) allows you to view up to 16 multiple traces at one time, enables you to transfer the information recorded in the logger to your computer, and to view, print and generate a report of the measurement data. The graphic representations include rotating 3D views, unlimited zooms, view temperature data points on the graph, view the total elapsed time or the exact time when it was recorded.

The graph and all data points (date, time and temperature) can be printed, as well as the ability to add a Note to the file for including information pertinent to that graphic trace. Users have the ability to view the numeric data within a screen window, calculate the Mean Kinetic Temperature of the recording as well as export data in a CSV format. A summary report showing the Start and Stop Time, High, Low, Median and Average temperatures as well as the Alarm information is also displayed. The data from the logger is downloaded to your PC via our proprietary RS232 serial interface cable or USB interface.

MDAS-Pro offers language support for English, French, German, Portuguese and Spanish. A separate installation program for Chinese and Japanese is also available on the CD-ROM with this version of the software. The software has been designed for the Microsoft operating system platforms and is compatible with Windows XP, Vista, 7, 8 and 10.

MaxiLog Cradle

IC-9P Cable
IC-9P Cable
usb to serial - stereo plug
USB-to-Serial Stereo Plug
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