• Weatherproof logger with integrated remote data transmission using 2G / 3G modem (4G optionally)
  • Reliable and energy-saving: optimised to collect environmental monitoring data in remote areas without any infrastructure
  • Logger can be operated fully independently (with batteries or solar module), integrated solar charge controller, protection IP 67
  • Ideal integration and compatibility with complete SOMMER sensor family as well as popular sensor technology products
  • Backlit display for easy data reading and logger parameterisation
  • Parameterisation via RS-232 and Bluetooth
  • Data readout with USB memory stick or Bluetooth-interface
  • Minimum energy demand; integrated solar charge controller
  • Solid, compact, and weatherproof aluminium box (powder coated)
SKU: 863 Kategorije: ,



Collecting, processing, storing and transmitting of monitoring data – easy, convenient and quick. The MRL-7 is a battery run data, modem supported logger with splash-proof housing, USB data read-out functions and integrated solar charge controller. The very energy efficient operating mode as well as a weatherproof box qualifies the MRL-7 for data applications in remote areas far from any infrastructure.


Similar to the “smaller” MRL-6, also the MRL-7 is used for applications in environmental monitoring, where low maintenance and a very energy saving operation is needed as for example at sites with no landline power network or where no additional switch cabinet shall be installed. The MRL-7 provides comfortable data transmission through its integrated modem. For this reason all-in-one solutions (sensor, data collection and transmission) can be realised very easily. In addition, remote access as well as wireless data read out and storing are possible.




  • Dimensions MRL-7: 180 x 150 x 60 mm | MRL-7B (with integrated battery): 180 x 150 x 60 mm (W x H x D)
  • Housing aluminium box, powder coated
  • Protection IP 67
  • Power supply
    • internal battery (MRL-7B): gel battery, 12 V 4 Ah
    • external battery: max 12 V / 50 Ah
    • external power supply: 6 … 30 V DC
    • integrated solar charge controller for solar panel with max 40 W / 12 V
  • Sensor supply 5 /100 mA or 12 V / 200 mA
  • Reference voltage 2.5 V for potentiometer (max. 4 mA)
  • Display LCD unit with digital contrast setting, 2 x 16 characters; LED background illumination with splash water proof cover and extended temperature range
  • Keypad 5 keys for reading current measurement values and observer confirmations/inputs
  • Number of channels up to 99
  • Memory (internal) 4 MB failure-resistant flash memory (equivalent to approx. 500,000 measurement values)
  • Operating temperature -35 °C … +60 °C (storage temperature: -35 °C … +60 °C)
  • Installation easy installation; attaching to walls without extra housing
  • Functions date values, intensity, maximum, aggregate values, mean values etc.
  • Deep discharge protection for logger and for MRL-7 supplied sensors


  • Inputs
    • 4 x analogue 0 … 2.5 V (thereof 1 x PT-100 4-wire connection, 1 x NTC, 1 x 0 … 0.3 V)
    • 2 x counters (thereof 1 x impulse, 1 x shaft encoder up and down)
    • 1 x frequency input for wind speed and wind gust
    • 1 x potentiometer input for wind direction (replaces 1 x counter)
  • Digital sensor interfaces 1 x RS 485 (SOMMER-Bus / ASCII protocols), 1 x RS-485 for web cam, 1 x SDI-12 interface
  • User Interface 1 x communication interface: RS-232: transfer rete 9.6 to 115 kBd, 1 x USB host (only for data readout of data on USB flash drive), 1 x Bluetooth
  • Output (digital resp. analogue) 4 x outputs (thereof 3 x switching outputs for alarm management)


  • Modem integrated remote data transmission with 2G or 3G modem (4G optionally)
  • Target server up to three target servers (http / ftp) simultaneously
  • Further characteristics
    • Independent transmission intervals possible
    • IP call activation for remote servicing (permanent or limited over time); fixed IP
    • Time synchronisation via NTP (Network Time Protocol)
  • GPS (optionally) GPS for location detection