Frequently Asked Questions

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O2 Analyzers

O2 Sensors

H2S Analyzers

Ambient Air Monitors

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Oil & Gas Pumping, Alarms & Monitoring

Southland Sensing

How does CO2 (Carbon Dioxide) and H2S (Hydrogen Sulfide) gas affect the sensor life?

CO2 and H2S gas can have an adverse effect on the life of our oxygen sensors. If you have an application that might contain CO2 or H2S, please contact a sales representative and ask for our recommendations. In most cases, we can offer another sensor model or sample system recommendation to negate the problem.

Can liquid or moisture affect the reading of the oxygen sensors?

Moisture does not damage the sensor, however build up of excess moisture can block the gas flow. Another issue to monitor is that moisture and other types of corrosive liquids can damage the electrical connections of the sensor rendering it non-responsive.

How does Southland Sensing’s precision oxygen sensor work?

The sensors are electrochemical devices which generate a current signal output (typically uA) that is proportional to the amount of oxygen present in the application. When no oxygen is present, the output has a theoretical value of zero. Once oxygen from the application diffuses into the membrane, a signal is generated through a chemical reaction that occurs between the anode, cathode and electrolyte solution.

How do I calibrate an oxygen sensor, how often should I calibrate it?

Calibration is recommended by using a certified span gas in the range of analysis. We recommend sourcing an O2 mixture that falls into the 80 – 100% of the range you are using. Calibration should be in intervals of 2 – 3 months or as required by your application.

How long can I store the sensors?

This is really dependent on the specific sensor as each may have a different storage life. For a general rule, we like to store our acid electrolyte sensors for a maximum of 3 months (for use with CO2 or Natural Gas). For our standard trace sensors, they can easily sit on a shelf up to 12 months as they are packaged in a nitrogen purged bags. For some of the higher output percent sensors, we would recommend 6 months or less. For our long life percent sensors, 12 months. When it doubt, reference the specification sheet of the sensor you are using as that has a more definitive answer.

Well Bell

How often does the equipment check in to the cloud?

Check-in's can occur on any set schedule you desire. Most of our clients prefer to gather data every 15min or every 5min.


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Liquid & Gas Sample Conditioning and Filtration