SO-120 Soil Response Thermocouple Reference Oxygen Sensor

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
Response Time (time required to read 90 % of saturated response) 60 seconds
Output at 0 % O2 5 % of output at 20.95 % O₂ or 2.5 ± 1 mV
Measurement Repeatability Less than 0.1 % of mV output at 20.95 % O₂
Non-linearity Less than 1 %
Signal Decrease per Year 1.8 % 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 lengthMass 175 g (with 5 m of lead wire)
Cable 5 m of six conductor, shielded, twisted-pair wire
Warranty 4 years against defects in materials and workmanship Manufactured Made in the USA