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Listed below are the chief differences between models.

model	edl-RF		edl-RF2		edl-M5
Memory	32K		32K		32K
Accuracy	0.5°C		0.5°C		0.2°C
Waterproof	Yes		No		Yes
Stationary Application	Yes		Yes		Yes
Mobile Application	No		No		Yes
Audible Alarms	No		Yes		No
High Gain Antenna	No		No		Yes
Power	Battery		AC		Battery/AC
Battery Liife (Logger)	3 years		3 years		3 years
Warranty	1 year		1 year		1 year
Operating Range	-40°C to +72°C	-80°C to +30°C	-40°C to +72°C	-80°C to +30°C	-40°C to +72°C	-80°C to +30°C
Price	$295	$395	$365	$395	$465	$495

With three models to choose from, our line of wireless temperature data loggers allow you to collect, monitor and manage temperature data via wireless communication in real-time. Avoid expensive "hard wired" installation costs for managing data. Synchronize your warehouse, laboratory and mobile applications with our 2-way "high-performance" radios. You can use up to 65,000 network addresses with our custom solutions.

Our software options allows user-selectable programming including:
    • alarm settings and notification options
    • database creation with supervisory controls
    • sorting options for products
    • tracking numbers, dates, locations, statistical analysis
    • real-time temperatures
and more.

Automatically transmit data at pre-selected intervals and review all of your temperature profiles first thing in the morning, or, at any time you choose.

Our RF products provide a low-cost approach to monitoring all of your temperature needs. With the use of our special relay units, wireless connections can be extended 3,000 feet or more for laboratory or warehouse applications. Long-range or short-range, we can meet your exacting requirements with our multi-version models. For mobile applications, our wireless data collectors can be configured for transmission ranges exceeding 1/2 of a mile.

Measurement data is maintained in each logger with a separate battery source from the radio frequency power source, so loss of wireless connection does not result in loss of recorded data. Continuous monitoring for Alarm Conditions and offsite notification via e-mail to PC or cell phone can be installed should the temperature exceed user-defined limits.

edl-RF Wireless Temperature Logger Specifications The Manufacturer Reserves the Right to Change Specifications Without Prior Notice
Price		$295-395
Temperature Range		-40C to 72C (-40F to 160F) -80C to 30C (-112F to 86F)
Temperature Accuracy		0.2C at center; 0.5C at extremes (0.36F at center; 0.9F at extremes)
Temperature Sensor		NIST traceable precision thermistor.
Memory EEPROM, Storage:		32k - Variable memory options
Measurement Intervals:		2 sec. increments up to 16 min. 58 sec. (or 365 Days recording duration)
Start		Push button and remote start via software
Alarm:		High and Low Alarm Limits set by temperature and time
Alarm Modes		Continuous and cumulative. Automatic or manual Reset Alarms
Indicators:		Power and Alarm
User notifications		Alarm conditions on-screen via email and cell phone
Accessories		Optional Ribbon Probe -40C or -80C RS232 serial port, USB or Ethernet Base Stations Relays for extending wireless communication
Power Source - Radio:		Two 3.6V Lithium batteries for radio; One 3V Lithium battery for data logging
Shelf Life - Data Logger		3 year of continuous use data logging
Physical Properties		3.61"x 1.11"x 4.78" (9.17cm x 2.82cm x 12.15cm) Weight 6.2 oz. (176 g)
Certifications		Not Applicable

edl-RF2 Wireless Temperature Logger Specifications The Manufacturer Reserves the Right to Change Specifications Without Prior Notice
Price		$365-395
Temperature Range		-40C to 72C (-40F to 160F) -80C to 30C (-112F to 86F)
Temperature Accuracy		0.2C at center; 0.5C at extremes (0.36F at center; 0.9F 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 20 miles with high-gain antennas
Start		Remote start view software or push button
Alarm programming:		High and Low alarm limits set by temperature and time
Alarm Modes		Continuous and cumulative
Alarm Notifications:		Alert notification to cell phone, pager and on desktop screen
Alarm Reset:		Push button—manually or by software
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
Power Source:		110-240V 50/60Hz AC Adaptor for wireless connectivity; user replaceable internal 3V Lithium battery for data logging function.
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)
Certifications		Not Applicable

edl-M5 Wireless Temperature Logger Specifications The Manufacturer Reserves the Right to Change Specifications Without Prior Notice
Price		$465-495
Temperature Range		-40C to 72C (-40F to 160F) -80C to 30C (-112F to 86F)
Temperature Accuracy		0.2C at center; 0.5C at extremes (0.36F at center; 0.9F at extremes)
Temperature Sensor		NIST traceable precision thermistor.
Range:		Up to 2000' indoor/urban range. Outdoor RF line-of-sight range with high-gain antenna, 20 miles.
Measurement Intervals:		2 sec. increments up to 16 min. 58 sec. (or 365 Days recording duration)
Start		Push button and remote start via software
Alarm:		High and Low Alarm Limits set by temperature and time limits
Alarm Modes		Continuous and cumulative options
Indicators:		Battery Check, System Connected, Alarm, On
User notifications		Alarm conditions on-screen via email and cell phone
Accessories		External connector to DC power supply; 110-240V 50/60Hz AC Adaptor; external relay for greater distance
Power Source:		4 D cell 1.5V Alkaline or 110-240V 50/60Hz AC Adaptor
Shelf Life - Data Logger		3 years of continuous use data logging
Physical Properties		6.32"x 4.88"x 2.89 " (16.05cm x 12.40cm x 7.34cm) Weight 2 lbs 8.6 oz. (1.27 kg) with 4 D cells
Certifications		Not Applicable

RF Module Specifications		The Manufacturer Reserves the Right to Change Specifications Without Prior Notice
Price		$395-495
General Frequency		902-928 MHz
Spread Spectrum		FHSS (Frequency Hopping Spread Spectrum)
Modulation		FSK (Frequency Shift Keying)
Supported Network Topologies		Peer-to-Peer ("Master/Slave relationship not required), Point to Point, Point to Multipoint and Multi drop
Channel Capacity		Ten hop sequences share fifty frequencies
Encryption		256-bit AES Encryption
Performance		9600 bps
Indoor Range		Up to 450m (1500')
Outdoor Range		RF line of sight Range; Up to 11km (7 mi) with dipole antenna
RF Data Rate		9600 bps
>Computer Interface		RS232 serial port, USB or Ethernet Base Stations
Receiver Sensitivity		-110 dBm -100 dBm
Power Requirements		110-240V 50/60Hz AC Adaptor
Physical Properties		6.99cm x 13.97cm x 2.86cm (2.75" x 5.5" x 1.125"; Weight: 200g (7.1oz); Power Requirements (Supply voltage and TX currents relative to each TX Power Output option) Supply Voltage 2.8 - 5.5 VDC 3.0 - 5.5 VDC 4.75 - 5.5 VDC
Certifications		FCC Part 15.247 Industry Canada (IC)

What are the advantages of the edl-RF?

Small size and completely waterproof; can be used outside and in damp conditions. In the event of a local AC power failure, the unit will transmit to the base station.

What are the disadvantages of the edl-RF?

Powered by batteries. The need to change the RF batteries may be greater if used extensively with the base station.

What are the advantages of the edl-RF2?

AC powered, so there is no need to change RF batteries. Long range transmission for transferring data.

What are the disadvantages of the edl-RF2?

The device is not waterproof and is for indoor use only. In the event of a power failure, communication will cease with the base station. However, the data logger will still continue to record temperature and the software (if configured) will send an alarm notification that communication has been lost with the logger (this is true for all our loggers).

What are the advantages of the edl-M5?

AC or battery powered. Long-range transmission for transferring data. Can be connected to a truck, trailer or placed within warehouse. In addition, waterproof case can withstand harsh conditions.

What are the disadvantages of the edl-M5?

If AC powered: in the event of a power failure, communication will cease with the base station. However, the data logger will still continue to record temperature and the software (if configured) will send an alarm notification that communication has been lost with the logger (this is true for all our loggers).

If battery powered: the need to change the RF batteries may be greater if used extensively with the base station.

For more information, download a Data Sheet in PDF format.

edl-RF DATA SHEET                 edl-RF2 DATA SHEET                 edl-M5 DATA SHEET

To open the Data Sheet, you will need Acrobat Reader 5.0 or higher. Click the icon below to download the newest reader software.

For information on the edl RF Software please click here.

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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.