Who we are…

Manufacturer and global supplier
of temperature data-collecting
devices used for documenting
products throughout the cold
chain. ISO 9001:2008 certified.


Cold Chain Solutions

Don't Ship without Us!®

•RF Wireless Temperature Data Loggers

Radio Frequency
Temperature Sensor that Logs Data

Alarm Notification via Cellphone or Email
Centralized Monitoring for pharmaceutical, biologics,
medical devices and combination products.

Certified Safe Storage

EDL-RF2 Wireless Temperature Logger Specifications
The Manufacturer Reserves the Right to Change Specifications Without Prior Notice
Call for Pricing    
Temperature Range   -40°C to +72°C (-40°F to +160°F)  OR -80°C to +30°C (-112°F to +86°F)
Temperature Accuracy 0.2°C at center, 0.5°C at extremes (0.4°F at center, 0.9°C at extremes)
Measurement Intervals:   2 sec. increments up to 4 hours (or 365 Days recording duration)
Memory EEPROM, Storage: 8,000 to 64,000 EEPROM memory options
Range:   Indoor urban environments 900-2,000 ft. and more with relays. Line of sight with high-gain antennas 1 mile (1.6 km).
Alarm Reset: Push button—manually or by software
Alarm Programming:   High and Low alarm limits set by temperature and time
Alarm Modes Continuous or cumulative. LED indicators.
Alarm Notifications:   Alert notification to cell phone, pager and on desktop screen
Power Source: 110-240V 50/60Hz AC Adaptor for wireless connectivity; user replaceable internal 3V Lithium battery for data logging function.
Battery backup failsafe prevents data loss.
Shelf Life - Data Logger   3 years of continuous use data logging
Physical Properties 3.11"x 3.60"x0.97" (79.0cm x 91.4cm x 24.8cm) Weight 9.0 oz. (250 g)
Accessories   Standard -40C or -80C flat ribbon probe included; external audible alarm boxes.
RS232 serial port, USB or Ethernet Base Stations
Relays for extending wireless communication
Certifications   Not Applicable

For more information:

Download a PDF of the EDL-RF2 Product Brief.
Download a PDF of the EDL-RF2 Quick Start Guide.

Get Adobe ReaderTo open the PDF files above, you will need Acrobat Reader 9.0 or higher.
Click the icon to download the latest reader software.

Follow this link for information on the EDL-RF2 & EDL-M5 Software

Note: Actual performance of the edl-RF system varies in each environment. Marathon strongly recommends the evaluation of the product in the actual environment of the application. Marathon publishes specifications typically experienced by our customer instead of publishing theoretical performance characteristics.

   rev. Nov-12-2014