Soil Oxygen Meter - ICT International

Soil Oxygen Meter - ICT International
Soil Oxygen Meter
Product Overview
Soil Oxygen Meter with Breakout Board
The Soil Oxygen Meter (SOM) measures the content
of oxygen in the soil and can support up to five ICT02
Soil Oxygen Sensors. The ICT02 sensors are
designed to be permanently installed in the soil and
measured continuously with a Soil Oxygen Meter
(SOM).
The ICTO2 Soil Oxygen Sensor performs
measurements based on a Galvanic cell principle.
Therefore it is a passive sensor and does not require
voltage input. The sensor has an automatic
temperature compensation via an in-built
thermocouple compensation circuit.
The sensors are Teflon coated and made from longlasting plastics. Life expectancy in the field is five
years.
Figure 2
ICT02 Sensor
Figure 1
The SOM is ideally used in combination with an
ICT Light Sensor Meter (LSM) to obtain data in
Figure 4. The SOM is also used in combination
with ICT’s Soil Moisture Meter (SMM) and for
measurement of water potential, Soil Tension
Meter (STM).
Figure 3
Solutions for soil, plant & environmental monitoring
www.ictinternational.com
Ph: +61 2 6772 6770
sales@ictinternational.com.au
Applications
Geotechnical Engineers
ICT International can offer to assist with defining
objectives of measurement programs,
developing a plan for measurement and
interpreting data.
Specifications
Theory
Shape
Output
Galvanic battery + porous
membrane sheet
Diameter 35 mm, length
65mm
(cable connector length
50mm)
45~65 mV at 20.9 % O2
(users must check the
output of the air before setup)
Accuracy
± 0.5 %
Weight
220 grams (includes 3 m
cables)
Cable Length
3 m (+ white, - black, shield
cable)
Temperature effect
At R.H. 100 % and O2 20.9
%. Sensor output is 20.8 %
at 5 C, 19.4 % at 40 C.
At R.H. 0 % and O2 20.9
%. Sensor output is not
Influenced by temperature.
Temperature
PAR
For example, in the mining and landfill industries the
sensors could be buried in wastes to aid
assessment of the effectiveness of covers designed
to reduce oxygen flux into the waste.
O2 (%)
The ICTO2 Soil Oxygen Sensor is not affected by
saline or sodic soils and can be used in wide
ranging applications.
Figure 4
Plant Physiologists
Plant species vary in their tolerance to anaerobic
and oxygen deprived soils. The Soil Oxygen Meter
can quantify the exact level of tolerance for all plant
species.
The Soil Oxygen Meter can be used to quantify the
level of soil oxygen content whereby this occurs for
individual plants.
Plant root systems uptake oxygen to support
respiration and other energy requirements. Figure
4 shows a correlation between photosynthetically
active radiation (PAR) and soil oxygen where a
noticeable decrease in soil oxygen content occurs
during the day.
With additional measurements this decrease in
oxygen content can be related to plant or microbe
activity.
The formation of aerenchyma in plant roots is a
common morphological response to decreased
oxygen in soils.
0~40 C when in use
Solutions for soil, plant & environmental monitoring
www.ictinternational.com
Ph: +61 2 6772 6770
sales@ictinternational.com.au
Features and Benefits

The SOM is a stand-alone instrument and
does not require extensive cables and
power requirements. All data is stored
within the unit on a removable SD card.

Communication with the SOM is made
either with a USB or wireless connection.
Wireless is compatible up to 250m
distance.

In conjunction with an ICT web-based
controller, the SOM and/or individual
sensors can be controlled remotely.
Real-time, live measurements can be
made remotely from any location with
internet access. Data can be logged
directly onto a remote computer or stored
in the field on an ICT log server which can
then be accessed via the internet.
ICT02 Soil Oxygen Sensors recording 02 levels
down bore holes at a mine site.
ICT02 Soil Oxygen Sensors connected to a Soil Oxygen
Meter (SOM) measuring oxygen concentration in aerobic
and anaerobic soil under rice

The SOM has a Windows configuration
software. The software is GUI based and
extremely user-friendly. Custom calibration
equations or data can be entered and
edited via the software. Real-time
measurements, diagnostics and sensor
configuration can easily be made.

The SOM has 2 wire, non-polarized bus for
power input and data. Because the SOM is
non-polarized there is no chance of incorrect
wiring of positive and negative voltage.

The SOM has an internal lithium-polymer battery that is kept charged by an external power
supply (solar panel or mains). The instrument has an internal voltage regulation for maximum
power reliability.

The SOM is IP68 rated and has been demonstrated to operate in extreme environmental
conditions. Units are being used in diverse environments from hot Australian deserts, tropical
Amazon rainforests, temperate German forests, Indian agricultural fields and North
American Arctic cold.
Solutions for soil, plant & environmental monitoring
www.ictinternational.com
Ph: +61 2 6772 6770
sales@ictinternational.com.au
SOM Specifications
Logging
Features
Power Management
Analogue Channels
5 differential or 10 single ended
Voltage Input Range
0 -15V
Pulse Channels
5
Resolution
0.00001V-24-Bit
 Optical Isolation Lightening Protection
Accuracy
0.001V
Logging
Response Time
1 second
 Stand-Alone Logging
Sampling Frequency
10Hz
 24-Bit Resolution
 Internal Lithium-Polymer Battery
 Power On/Off Switch
 Internal Voltage Regulation
 MicroSD Expandable Memory
Data
 USB Connectivity
Communications:
USB, Wireless Radio Frequency 2.4 GHz
Data Storage
MicroSD Card, SD, SDHC & SDXC Compatible
(FAT 32 Format)
Software Compatibility
Windows XP, Vista and Windows 7
Data File Format
Comma Separated Values (CSV) format for
compatibility with all software programs
Memory Capacity
2GB expandable to 64GB
 Wireless Data Transfer
 IP68 Water Proof Rating
 Free Windows Utility Configuration Software
Accessories
 MCC
 Quad Band GPRS, GSM, 3-G CDMA
Modem
Operating Conditions
Temperature Range
-40  C to +80  C
R/H Range
0 -100%
Upgradable
User upgradeable firmware using USB boot
strap loader function
Power
Power supply
12V DC 2-wire non polarized bus
Power Consumption
20 mA
Internal Battery
Monitoring
Logging internal battery voltage & charging
current
Charging Rate
Automatic variable rate of charging to maximise
solar panel charging current on full sun days
and or under low light cloudy conditions.
Variable current 10 mA to 200 mA
Solutions for soil, plant & environmental monitoring
www.ictinternational.com
Ph: +61 2 6772 6770
sales@ictinternational.com.au
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