The Durham Geo M-Logger is used to monitor Slope Indicator MEMS sensors.  The M-Logge is  also compatible with EL-SC sensors. Simple to use and economical to deploy, M-Loggers can be placed close to sensors, enhancing reliability and keeping cable costs down.

When the M-Logger is equipped with wireless communications modules, data can be retireved automatically and forwarded to a web-based monitoring site, such as Atlas.


  • Top-of-hole monitoring of in-place inclinometer sensors.
  • Local monitoring of beam sensors and track sensors.
  • Monitoring in areas where heavy traffic or electrical noise make short signal cables necessary.
  • Monitoring sensors that are too far apart to connect to a centralized data acquisition system.


Simple Setup: M-Loggers are very easy to configure. The user enters a list of sensors, sets a start time, and specifies a logging interval. After that, the logger is ready for work.

Cost-Effective: M-Loggers are a cost-effective alternative to centralized data acquisition systems. Local deployment of the logger eliminates the cost of installing and protecting long runs of cable.

Spreadsheet Friendly: CSV files from the logger are ready for import, with dates and numbers formatted to the regional settings in Windows.

Wireless Data Retrieval: Manager software makes wireless data retrieval easy and automatic. Of course, data can also be retrieved by direct connection.

Push to Web: Manager software can sorward data files to a web-based monitoring site, such as Atlas, for automated processing.

Automation-Ready: Data formats for automatic processing include the Campbell Scientific table format and the Slope Indicator ID format.

System Components

For more information

Please download the datasheet and the manual for the M-Logger. These documents can be viewed and printed with Adobe Acrobat Reader.

M-Logger Specifications

M-Logger58810100Manager software and a serial interface cable are included with the logger
FunctionThe M-Logger is a data logger for Slope Indicator MEMS sensors and EL SC sensors
CapacityOne chain of 16 serial sensors, or one Campbell Scientific multiplexer with 16 standard sensors, or 1 standard sensor connected directly
MemoryNon-volatile flash memory holds 7,900 records for each sensor. Each record includes time and date, A and B-axis tilt readings, and temperature reading
Logger Resolution0.004% FS (16-bit) for tilt readings. 0.1°C for temperature readings
Logger Accuracy±0.02% of tilt reading at 20 °C or ±0.06% of tilt reading at -20 to +50 °C
Logging Interval30 second minimum interval; 7 day maximum interval
Serial PortsPC port for serial communications with PC. Interface cable is included with logger. Power In: Nominal 12Vdc ( 8 to 15Vdc)
Power InNominal 12Vdc (8 to 15Vdc)
Power OutSwitched 12V output for serial sensors or multiplexer
EnvironmentalTemperature rated for -20 to +50 °C. Logger normally housed in an enclosure
Dimensions120 x 80 x 40 mm. (4.7 x 3 x 1.6")
FunctionUsed to configure the logger. Can also display real-time readings and retrieve data
System RequirementsRuns on Windows XP, Vista, and Windows 7. Communicates with logger via an RS-232 serial connection. If PC has only USB ports, a USB-serial adaptor is required
SettingsLogger ID, real-time clock, memory mode, sensor list, multiplexing mode, logging schedule, and communications parameters
Real-Time ReadingsThe Manager program can display real-time readings of sensors when PC is connected to the logger
Data RetrievalWorks with interface cable or line-of-sight radio. Retrieves new or all readings. Can clear data from logger memory
File FormatsCSV, Campbell Scientific, and Slope ID. CSV uses Windows regional settings for date, time, and numbers and is suitable for spreadsheets. The Campbell Scientific format and Slope ID formats are useful for automation and monitoring software, such as Atlas
AM16/32 Multiplexer56702110
Terminal Board26811615
Connection of multiple standard sensor requires a multiplexer and a terminal board. The terminal board is used to connect power wires from multiple sensors. Note that the multiplexer option is not needed when serial sensors are connected to the logger.
Battery, 12V 7ah01940004
Battery Bracket58810160
Charging Regulator58810161
AC Adaptor58810165
Solar Panel, 10W56703310
Solar Panel, 20W56703325
A battery and battery bracket are normally ordered with every system. A 12V 7ah battery can power an M-Logger taking hourly readings for about 140 days.
For longer term deployment , the charging regulator and a power source are required.
The power source can be an AC charger or a solar panel. The AC charger includes various wall plugs. The solar panel includes hardware for mounting on pole.
Small Enclosure56705005The small enclosure is suitable for systems that monitor serial sensors or a single standard sensor. Dimensions are 305 x 356 mm (12 x 14").
Medium Enclosure56705010The medium enclosure is required for systems with a multiplexer. Dimensions are 356 x 406mm (14 x 16").
System Assembly96700005The system assembly charge is required when components are mounted in the enclosures at the factory.
Weatherproof enclosures are required for outdoor applications. These strong fiberglass enclosures provide an internal panel for mounting components, an external grounding lug, and an opening for cable entry.
Atlas Monthly Web Service58851050
Atlas Prepaid Web Service58851090
Atlas Activation Fee58851000