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SENSORS & PROBES
SO-210 Fast Response Thermistor Reference Oxygen Sensor
The SO-210 has a fast response time of 14 seconds.
It has been designed for use in soil applications, and has high-quality cable terminating in pre-tinned pigtail leads for easy connection to dataloggers and controllers.
Apogee oxygen sensors are designed to measure 0 – 100% oxygen and come with tinned leads to connect to a datalogger. The SO-210 is designed for use in lab applications with a faster response. It comes with a thermistor temperature sensor to correct for temperature changes. In applications with high humidity, condensation can occur on the Teflon membrane, blocking the diffusion path of the sensor. To prevent this, a resistive heater is included to raise the temperature of the membrane approximately two degrees above ambient temperature. Select a diffusion or flow-through head if needed depending on your application. The sensor is calibrated to ambient air making it very easy to calibrate. An aluminum housing that is filled with epoxy allows the sensor to withstand harsh conditions.
Accessories for Oxigen Sensor SO-110, SO-120, SO-210, SO-220.
Shown with optional diffusion and flow-through heads (sold separately).
Measurement Range: 0 to 100 % O2
Sensitivity: 2.6 and 0.6 mV per % O2 for SO-100 and SO-200 series, respectively
Output at 0 % O<sub>2</sub>: 6 % and 3 % of output at 20.95 % O2 for SO-100 and SO-200 series, respectively
Measurement Repeatability: < 0.1 % of mV output at 20.95 % O2
Non-linearity: < 1 %
Non-stability (Signal Decrease): 1 and 0.8 mV per year for SO-100 and SO-200 series, respectively
Oxygen Consumption Rate: 2.2 μmol O2 per day at 20.95 % O2 and 23 C
Response Time: 60 and 14 s for SO-100 and SO-200 series, respectively
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
Thermistor Current Drain: 0.1 mA DC at 70 C (maximum, assuming input excitation of 2.5 V DC)
Dimensions: 3.2 cm diameter, 6.8 cm length
Mass: 175 g (with 5 m of lead wire)
Cable: 5 m of six conductor, shielded, twisted-pair wire
- The Sensor measures:
- O2 + Temperature
- Cable Length:
- 5 meters
- Power Supply:
- 12Vdc heat/2.5Vdc thermistor
- Sensor for use in:
- Outdoor
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