Soil / Air Oxygen Meter

Model MO-200

This model is designed to measure 0 to 100 % oxygen and is connected to a hand-held meter via cable that displays and stores measurements. The wide measurement range allows it to be used for applications either in the soil or in the lab with the diffusion or flow-through head accessories. The sensor is housed in a polypropylene body and electronics are fully potted.

Model SO-421

This model has a fast response time of 14 seconds, is designed for use in lab applications, and has high-quality cable terminating in pre-tinned pigtail leads for easy connection to dataloggers and controllers. It comes with a thermistor temperature sensor to correct for temperature changes and a resistive 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.

Applications

• Measurement of O2 in laboratory experiments
• Monitoring gaseous O2 in indoor environments for climate control
• Monitoring of O2 levels in compost piles and mine tailings
• Monitoring redox potential in soils
• Determination of respiration rates through measurement of O2 consumption in sealed chambers or measurement of O2 gradients in soil/porous media

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