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

Each logger can monitor a chain of 16 serial sensors, or one multiplexer with 16 standard sensors, or one standard sensor connected directly.

The logger is powered by a 12 V battery. Longterm deployment or wireless communications normally requried a charging regulator and power source such as an AC adaptor or solar panel.

A multiplexer is available for connecting non-serial sensors. Serial sensors need no multiplexer

Small and medium sized boxes are available

These include point-to-point radios, cell modems, and Wi-Fi radios.

Manager software for Windows is included with the logger. The software is used for setups and for retrieving data. It offers scheduled, automatic data retrieval and cann push data files to specified internet addresses as well as storing files locally.

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-Logger 58810100 Manager software and a serial interface cable are included with the logger
Function The M-Logger is a data logger for Slope Indicator MEMS sensors and EL SC sensors
Capacity One chain of 16 serial sensors, or one Campbell Scientific multiplexer with 16 standard sensors, or 1 standard sensor connected directly
Memory Non-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 Resolution 0.004% 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 Interval 30 second minimum interval; 7 day maximum interval
Serial Ports PC port for serial communications with PC. Interface cable is included with logger. Power In: Nominal 12Vdc ( 8 to 15Vdc)
Power In Nominal 12Vdc (8 to 15Vdc)
Power Out Switched 12V output for serial sensors or multiplexer
Environmental Temperature rated for -20 to +50 °C. Logger normally housed in an enclosure
Dimensions 120 x 80 x 40 mm. (4.7 x 3 x 1.6")
Function Used to configure the logger. Can also display real-time readings and retrieve data
System Requirements Runs 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
Settings Logger ID, real-time clock, memory mode, sensor list, multiplexing mode, logging schedule, and communications parameters
Real-Time Readings The Manager program can display real-time readings of sensors when PC is connected to the logger
Data Retrieval Works with interface cable or line-of-sight radio. Retrieves new or all readings. Can clear data from logger memory
File Formats CSV, 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 Multiplexer 56702110
Terminal Board 26811615
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 7ah 01940004
Battery Bracket 58810160
Charging Regulator 58810161
AC Adaptor 58810165
Solar Panel, 10W 56703310
Solar Panel, 20W 56703325
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 Enclosure 56705005 The 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 Enclosure 56705010 The medium enclosure is required for systems with a multiplexer. Dimensions are 356 x 406mm (14 x 16").
System Assembly 96700005 The 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 Service 58851050
Atlas Prepaid Web Service 58851090
Atlas Activation Fee 58851000