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Apogee Instruments' oxygen sensors reliably measure 0 to 100 % gaseous O2.

Heated Detector
The protective membrane in front of the oxygen sensor can be heated to prevent water from condensing on the membrane and blocking the diffusion path. The heater is typically used when sensors are deployed in soil or compost where relative humidity is close to 100 %.

Rugged Housing
Housed in a polypropylene body and electronics are fully potted, ideal for long-term deployment in porous media, including acidic environments (mine tailings). Two head options are available: a diffusion head that creates a small air pocket for measurement in porous media and a flow-through head with two adapters for tubing that allows measurement of gas flowing in lines.

Simple Calibration
Voltage output is linearly proportional to absolute amount of oxygen. Calibration is accomplished by measuring the voltage under ambient conditions (atmosphere is 20.95 % O2) and deriving a linear calibration factor (slope). A zero offset can be measured with N2 gas (recommended for measurements below 10 % O2.

Typical Application
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 tailings, 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.

Internal Temperature Sensor
All oxygen sensor have an internal thermistor (type-K thermocouple is available upon request) that allows for temperature monitoring and correction of signal for temperature effects.

Output Options
Analog and digital output options are available. Analog version is an un-amplified voltage output. Oxygen sensors are also available attached to a hand-held meter with digital readout.

Warranty and Support
All Apogee products are backed by an industry-leading four year warranty and outstanding customer support.

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  Technical Information
Technical Information
Find knowledge base articles, manuals, FAQs, technical support, and more.
 
 
Does this sensor measure dissolved oxygen?
 
No, it measures the absolute concentration of gaseous oxygen.
 
Can I add additional cable to the sensor?
 
Yes, if properly spliced, the signal from the sensor is not affected by splicing on additional cable. Please check the Owner's Manual for details and limitations on adding cable. For information on how to create a proper waterproof splice, please visit our instructional webpage or watch our video. We offer custom cable lengths of our high quality cable and splice kits that can be ordered at the time of purchase or a later date.
 
Do I need to order a sensor to go with my meter?
 
No. All Apogee meters (MO, MI, MP, MQ, and MU series) either have sensors built into the meter or attached via two meters of cable. If you order a sensor only (SI, SO, SP, SQ, and SU series) you will need to have your own datalogger (or, depending on the sensor, a voltmeter) to collect information form the sensor.
 
Can I add cable to my meter?
 
Although it is possible to splice additional cable to the separate sensor, note that the cable wires are soldered directly into the circuit board of the meter. Care should be taken to remove the back panel of the meter in order to access the board and splice on the additional cable, otherwise two splices would need to be made between the meter and sensor head. Click here for further details on how to extend sensor cable length.
 
What are the typical applications of Apogee oxygen sensor?
 
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 tailings, 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. Apogee oxygen sensors are not intended for use as medical monitoring devices.
 

spec sheets
Specification Sheets

 

 


Models