|  |

| |

Enabling better global research outcomes in soil, plant & environmental monitoring.

ICT SDI-12 Logger

The ICT SDI-12 logger is ideal for use with SDI-12 output Soil Moisture Sensors, such as the Acclima TDR series.

The SDI-12 Logger has been developed by ICT International to measure the many and ever increasing number of sensors with SDI-12 output. The SDI-12 Logger can support up to 30 sensors, stores data on an internal MicroSD card for retrieval either using the USB port, 2.4GHz wireless; or, when combined with the ICT International Telemetry Hub, via mobile phone or satellite networks.

Common SDI-12 sensors are pre-programmed in a look up database, requiring minimal prior knowledge of the sensor outputs. Additional sensors that are not in the database can be added for future applications; ICT Combined Instrument Software is compatible with both Windows and Mac.

Powered by a Lithium Polymer battery, charged either via a solar panel for field applications, or the CH24 24 Volt power supply for laboratory applications, the SDI-12 Logger is a versatile logger for a variety of applications.

Designed specifically for collecting data from SDI-12 sensors, the SDI-12 Logger is capable of collecting data from a maximum of 30 individual sensor units and capable of logging up to 250 parameters for measuring a wide range of plant, soil and atmospheric properties. Collected data is stored on an easily removable internal MicroSD card in CSV format, allowing a user to either take the card out and read the data file directly on their PC or download data directly from the SDI-12 Logger via a USB cable. Remote access using either a 2.4GHz wireless network – over distances up to 4km depending on setup and environmental conditions – or in combination with the ICT International Telemetry Hub (utilising either a 3G mobile phone or satellite network), data can be transferred wirelessly and uploaded to the cloud-based data server.

The ICT International Combined Instrument Software (CIS) provides an intuitive interface for viewing live measurements, downloading logged data, and configuring the SDI-12 Logger and input sensors. Drawing from a database maintained by ICT International the most commonly used SDI-12 sensors for soil, plant and environmental monitoring can be configured easily within CIS, without requiring detailed user knowledge about sensor outputs. SDI-12 sensors which aren’t in the database can be configured manually. The CIS allows the end user to perform common actions on the SDI-12 bus such as single device query, device address changing and bus address scanning. To reduce the need for data post processing, the ICT International SDI-12 Logger utilises a system of conversion tables and scripts. Measurements collected from sensors can be converted into derived values directly on the logger itself or combined to create completely separate, virtual channels.

Powered by an internal Li-Po battery, the SDI-12 Logger is kept charged by directly connecting a solar panel to the logger or an ICT International CH24 24 Volt DC power supply. When charging via a solar panel, the battery charge rate is automatically matched to available sunlight and battery status.

Data Storage and Transfer:
  • CSV files, FAT32 MicroSD/SDHC cards up to 32GB.
  • USB 2.0 Full Speed (12Mbps)
SDI-12 Communication Protocol
  • Connect with up to 10 devices, or more depending on application.
  • Compatible with SDI-12 Specification 1.3
Concurrently handles Sensors with:
  • Result Output (aR!)
  • Measurement Command (aM!)
  • Concurrent Measurement Command (aC!)
Logging Rate: From once per second to once per day using:

  • Sub minute measurement intervals (1s – 60s)
  • Standard measurement intervals (1m – 60m)
  • Custom measurement intervals (up to 24 custom measurement times)
Channels: Up to 250 channels, including:

  • Direct sensor readings
  • Converted sensor readings
  • Virtual channels
Bus Power Management: Bus Power Modes:

  • Power down after measurement
  • Always on Bus monitoring:
    • Bus current monitoring and logging
    • Bus voltage monitoring and logging
Power Supply:
  • Internal Lithium Polymer (LiPo) battery
  • Rechargeable via:
    • 22W Solar Panel charge rate automatically adjusts depending on available sunlight
    • ICT International CH24 24 Volt Power Supply
  • Extruded hard anodised aluminium body
  • UV, moisture, and impact resistant endcaps
  • 316 stainless steel external fasteners
  • Sealed service hatch provides access to power switch, USB connection and MicroSD card


  • TDR-315L
    The Acclima TDR-315L is a true Time Domain Reflectometer system (minus the coaxial cable) wrapped up in a small, rugged, permanently installable package. This model uses half the power yet it sacrifices none of the accuracy of its big brother the TDR-315. Acclima True TDR technology is a major, patented breakthrough in soil water and EC measurement technology.
  • TDR-310
    The Acclima TDR-310 series sensors are genuine Time Domain Reflectometers – complete with an integrated 350ps rise-time step function generator, a 10 cm waveguide, a 5ps resolution waveform digitiser and a precision time base that measures waveform temporal features as short as 5ps and as long as 20ns.
  • CH24 - 24 Volt Power Supply
    The CH24 is a 100 - 240Volts AC Mains to 24Volts DC power supply adapter; capable of outputting up to 2.5Amps. For most ICT Instruments.
  • ICT Universal Telemetry Hub
    ICT Universal Telemetry Hub
  • SP22 - 20 Watt Solar Panel
    SP22 - 20 Watt Solar Panel with 4m cable suitable for powering our SFM1, PSY1, HFD, SOM1, SMM1 etc products.