• Soil Response Thermistor Reference Oxygen Sensor


The SO-110 has a standard response time of 60 seconds and is designed for use in soil applications. It comes with a thermistor temperature sensor to correct for temperature changes and a restive heater to raise the temperature of the membrane approximately two degrees above ambient temperature to keep condensation from occurring on the Teflon membrane and blocking the diffusion path of the sensor. Typical applications include measurement of O2 in laboratory experiments, monitoring gaseous O2 in indoor environments for climate control, monitoring of O2 levels in compost piles and mine sailings, monitoring redox potential in soils, and determination of respiration rates through measurement of O2 consumption in sealed chambers or measurement of O2 gradients in soil/porous media.


Measurement Range: 0 to 100 % O₂
Sensitivity: (at sea level, 101.3 kPa) 52-58 mV in 21 % O₂, 2.6 mV per % O₂, 26 µV per 0.01 % O₂
Output: at 0 % O2 5 % of output at 20.95 % O₂ or 2.5 ± 1 mV
Response Time: (time required to read 90 % of saturated response) 60 s
Measurement Repeatability: Less than 0.1 % of mV output at 20.95 % O₂
Non-linearity: Less than 1 %
Signal Decrease per Year: 1 mV per year
Oxygen Consumption Rate: 0.1 µmol O₂ per day at 20.95 % O₂ and 23 C
Operating Environment: -20 to 60 C, 0 to 100 % relative humidity (non-condensing); 60 to 140 kPa
Input Voltage Requirement: 12 V DC continuous (for heater), 2.5 V DC excitation (for thermistor)
Heater Current Drain: 6.2 mA (74 mW power requirement when powered with 12 V DC source)
Thermistor Current Drain: 0.1 mA DC at 70 C (maximum, assuming input excitation of 2.5 V DC)
Dimensions: 32 mm diameter, 68 mm length
Mass: 175 g (with 5 m of lead wire)
Cable: 5 m of six conductor, shielded, twisted-pair wire


• Product Manual

• Specification Sheet

• Technical Drawing

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Soil Response Thermistor Reference Oxygen Sensor

  • Brand: manufacturer
  • Product Code: SO-110
  • Availability: In Stock
  • 1,785.00 AED

  • Ex Tax: 1,700.00 AED

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